Saturday, December 5, 2020

THE WATER CYCLE - The Atmosphere and Weather are Essential to the Water Cycle - Of the world's total water supply, 97% is salt water found in our oceans. That means that less than 3% of available water is freshwater and acceptable for our use. Consider that of that three percent, over 68% is frozen in ice and glaciers and 30% is underground. This means that under 2% of freshwater is readily available to quench the needs of everyone on Earth! Every drop of rain that falls from the sky isn't brand new, nor is every glass of water you drink. They have always been here on Earth they've just been recycled and re-purposed. Evaporation is considered to be the first step of the water cycle. In it, water that's stored in our oceans, lakes, rivers, and streams absorbs heat energy from the sun which turns it from a liquid into a gas called water vapor (or steam). Of course, evaporation doesn't just happen over bodies of water -- it happens on land too. When the sun heats the ground, water is evaporated from the top layer of soil -- a process known as evapotranspiration. Likewise, any extra water that isn't used by plants and trees during photosynthesis is evaporated from its leaves in a process called transpiration. A similar process happens when water that's frozen in glaciers, ice, and snow converts directly into water vapor (without first turning into a liquid). Called sublimation, this happens when the air temperature is extremely low or when high pressure is applied. Now that water has vaporized, it is free to rise up into the atmosphere. The higher it rises, the more heat it loses and the more it cools off. Eventually, the water vapor particles cool so much that they condense and turn back into liquid water droplets. When enough of these droplets collect, they form clouds.

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The Water Cycle

The Atmosphere and Weather are Essential to the Water Cycle

By Tiffany Means

 

You've likely heard of the hydrologic (water) cycle before and know that it describes how Earth's water journeys from the land to the sky, and back again.

But what you may not know is why this process is so essential.

Of the world's total water supply, 97% is salt water found in our oceans.

That means that less than 3% of available water is freshwater and acceptable for our use.

Think that's a small amount?

Consider that of that three percent, over 68% is frozen in ice and glaciers and 30% is underground.

This means that under 2% of freshwater is readily available to quench the needs of everyone on Earth!

Are you beginning to see why the water cycle is so essential? Let's explore the steps. 

All Water Is Recycled Water

Here's some food (or drink) for thought: every drop of rain that falls from the sky isn't brand new, nor is every glass of water you drink.

They have always been here on Earth, they've just been recycled and re-purposed, thanks to the water cycle which includes 5 main processes:

o  Evaporation (including sublimation, transpiration)

o  Condensation

o  Precipitation

o  Surface runoff (including snowmelt and streamflow)

o  Infiltration (groundwater storage and eventual discharge)

Evaporation, Transpiration, Sublimation Move Water Into the Air

Evaporation is considered to be the first step of the water cycle.

In it, water that's stored in our oceans, lakes, rivers, and streams absorbs heat energy from the sun which turns it from a liquid into a gas called water vapor (or steam).

Of course, evaporation doesn't just happen over bodies of water -- it happens on land too.

When the sun heats the ground, water is evaporated from the top layer of soil -- a process known as evapotranspiration.

Likewise, any extra water that isn't used by plants and trees during photosynthesis is evaporated from its leaves in a process called transpiration.

A similar process happens when water that's frozen in glaciers, ice, and snow converts directly into water vapor (without first turning into a liquid).

Called sublimation, this happens when the air temperature is extremely low or when high pressure is applied.

Condensation Makes Clouds

Now that water has vaporized, it is free to rise up into the atmosphere. The higher it rises, the more heat it loses and the more it cools off.

Eventually, the water vapor particles cool so much that they condense and turn back into liquid water droplets. When enough of these droplets collect, they form clouds.

Precipitation Moves Water From the Air to Land

As winds move clouds around, clouds collide with other clouds and grow.

Once they grow big enough, they fall out of the sky as precipitation (rain if the atmosphere's temperatures are warm, or snow if its temperatures are 32° F or colder).

From here, precipitating water can take one of several paths:

If it falls into the oceans and other bodies of water, its cycle has ended and it is ready to begin again by evaporating yet again.

On the other hand, if it falls on land, it continues on the water cycle journey and must find its way back to the oceans.

So that we can continue exploring the complete water cycle, let's assume option #2 -- that the water has fallen over land areas.

Ice and Snow Move Water Very Slowly Along in the Water Cycle

The precipitation that falls as snow over land accumulates, forming seasonal snowpack (layers upon layers of snow that continually accumulates and becomes packed down).

As spring arrives and temperatures warm, these large amounts of snow thaw and melt, leading to runoff and streamflow.

(Water also stays frozen and stored in ice caps and glaciers for thousands of years!)

Runoff and Streamflow Moves Water Downhill, Towards Oceans

Both the water that melts from snow and that which falls on the land as rain flows over the surface of the earth and downhill, due to gravity's pull.

This process is known as runoff. (Runoff is hard to visualize, but you've probably noticed it during heavy rain or a flash flood, as water flows hurriedly down your driveway and into storm drains.)

Runoff works like this: As water runs over the landscape, it displaces the ground's top-most layer of soil.

This displaced soil forms channels which the water then follows and feeds into the nearest creeks, streams, and rivers. Because this water flows directly into rivers and streams it is sometimes referred to as streamflow.

The runoff and streamflow steps of the water cycle play a key part in making sure water gets back into the oceans to keep the water cycle going.

How so? Well, unless rivers are diverted or dammed up, all of them eventually empty into the ocean!

Infiltration

Not all of the water that precipitates ends up as runoff. Some of it soaks into the ground -- a water cycle process known as infiltration.

At this stage, the water is pure and drinkable.

Some of the water that infiltrates the ground fills aquifers and other underground stores.

Some of this groundwater finds openings in the land surface and re-emerges as freshwater springs.

And still, some of it is absorbed by plant roots and ends up evapostranspiring from leaves.

Those amounts that stay close to the land surface, seep back into surface bodies of water (lakes, oceans) where the cycle starts all over again.

Additional Water Cycle Resources for Kids and Students

Thirsty for more water cycle visualizations? Check out this student-friendly water cycle diagram, courtesy of the U.S. Geological Survey.

And don't miss this USGS interactive diagram available in three versions: beginner, intermediate, and advanced.

Activities for each of the water cycle's main processes can be found at the National Weather Service's Jetstream School for Weather Hydrologic Cycle page.

The USGS Water Science School has two great resources: The Water Cycle Summary and Where is Earth's Water?

Tiffany Means

Meteorology Expert

Education

B.S., Atmospheric Sciences and Meteorology, University of North Carolina

Introduction

Studied atmospheric sciences and meteorology at the University of North Carolina

Former administrative assistant for the National Oceanic and Atmospheric Administration

Member of the American Meteorological Society

Experience

Tiffany Means is a former writer for ThoughtCo who contributed articles about weather for five years. She has interned with the domestic and international weather departments at CNN, written monthly climate reports for NOAA’s National Centers for Environmental Prediction, and participated in a number of science outreach events, including the Science Olympiad Competition. Means has personally experienced such weather greats as the Blizzard of 1993 and the floods of Hurricane Francis (2004) and Ivan (2004).

Education

Bachelor's degree in atmospheric sciences and meteorology from the University of North Carolina at Asheville

ThoughtCo and Dotdash

ThoughtCo is a premier reference site focusing on expert-created education content. We are one of the top-10 information sites in the world as rated by comScore, a leading Internet measurement company. Every month, more than 13 million readers seek answers to their questions on ThoughtCo.

For more than 20 years, Dotdash brands have been helping people find answers, solve problems, and get inspired. We are one of the top-20 largest content publishers on the Internet according to comScore, and reach more than 30% of the U.S. population monthly. Our brands collectively have won more than 20 industry awards in the last year alone, and recently Dotdash was named Publisher of the Year by Digiday, a leading industry publication.

https://www.thoughtco.com/the-water-cycle-4049926


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Rain Clouds

Without clouds, it would not rain

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https://puricarechronicles.blogspot.com/2020/11/rain-clouds-science-in-bible-clouds-are.html

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 Water Vapor Saturation 

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https://puricarechronicles.blogspot.com/2019/10/water-vapor-saturation-air-in-our.html

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Let's Talk About Water

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https://puricarechronicles.blogspot.com/2019/12/lets-talk-about-water-in-all.html

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The Hydrologic Cycle

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https://puricare.blogspot.com/2018/02/the-hydrologic-cycle-sun-causes.html

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The Hydrological Cycle or Water Cycle

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https://puricare.blogspot.com/2016/05/the-hydrological-cycle-or-water-cycle.html

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Hydrologic Cycle, Surface and Groundwater Impurities

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https://puricare.blogspot.com/2016/07/water-sources-hydrologic-cycle-and.html

Thursday, December 3, 2020

OIL AND CHEMICAL SPILLS - NOAA provides scientific expertise, data, tools, training, and assistance to help people respond to oil and chemical spills. Each year, there are thousands of oil and chemical spills in coastal waters around the nation. These spills range from small ship collisions to fuel transfer mishaps to massive spill events. The release of oil and chemicals into our coastal waterways can kill wildlife, destroy habitat, and contaminate critical resources in the food chain. Spills can also wreak havoc on the economies of coastal communities by forcing the closure of fisheries, driving away tourists, or temporarily shutting down navigation routes. And these environmental and economic damages can linger for decades. When dealing with oil and chemical spills, there are many questions that need to be answered. NOAA is charged with responding to oil spills, hazardous material releases, and marine debris, primarily through the Ocean Service’s Office of Response and Restoration (OR&R). Regional NOAA scientific support coordinators organize NOAA resources in support of federal and state response efforts and work with scientists from other public agencies, academia, and the private sector to support operations when an oil or chemical spill occurs. One of the primary services provided by the Office of Response and Restoration is advanced computer modeling, necessary to forecast where a given spill might go and its potential effects on the coastal environment.





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Oil and Chemical Spills

NOAA provides scientific expertise, data, tools, training, and assistance to help people respond to oil and chemical spills.

National Ocean Service



NOAA brings scientific expertise to the table

Each year, there are thousands of oil and chemical spills in coastal waters around the nation.

These spills range from small ship collisions to fuel transfer mishaps to massive spill events like the BP Deepwater Horizon oil spill.

The release of oil and chemicals into our coastal waterways can kill wildlife, destroy habitat, and contaminate critical resources in the food chain.

Spills can also wreak havoc on the economies of coastal communities by forcing the closure of fisheries, driving away tourists, or temporarily shutting down navigation routes.

And these environmental and economic damages can linger for decades.

When dealing with oil and chemical spills, there are many questions that need to be answered.

What was spilled?

Where is the spill likely to travel in the water?

How is the local environment affected now — and how might it be affected down the road?

What's the best way to clean up the spill?

How will balance be restored to the environment after the damage has been done?

NOAA brings scientific expertise to the table to help answer these questions.

Response and Restoration

NOAA is charged with responding to oil spills, hazardous material releases, and marine debris, primarily through the Ocean Service’s Office of Response and Restoration (OR&R).

This office’s Emergency Response Division is often first on the scene, providing scientific expertise to predict where the spill is going and what impacts it might have, identifying resources at risk, and recommending clean-up methods.

Regional NOAA scientific support coordinators organize NOAA resources in support of federal and state response efforts and work with scientists from other public agencies, academia, and the private sector to support operations when an oil or chemical spill occurs.

One of the primary services provided by the Office of Response and Restoration is advanced computer modeling, necessary to forecast where a given spill might go and its potential effects on the coastal environment.

To help in planning and responding to spills, NOS scientists also create environmental sensitivity index maps.

These maps are created to serve as quick reference guides that describe the characteristics and uses of the shorelines near spill areas — critical information that helps responders decide how to deploy limited resources and manpower.

First responders also have access to numerous other tools and information provided by NOS scientists.

These tools include job aids for use during oil spills to determine amounts of oil spilled and best response guidelines.

Specialized aids are also available for sensitive habitats such as coral reefs.

The work isn’t done when the bulk of the spill clean-up is complete.

Staff from the Office of Response and Restoration’s Assessment and Restoration Division play a critical role in NOAA’s Damage Assessment, Remediation, and Restoration Program — a cross-NOAA program comprised of scientists, economists, attorneys, and restoration experts.

These experts work in teams to protect and restore coastal resources threatened by waste sites, oil and chemical spills, and ship groundings.

Through a process known as natural resource damage assessment, NOS scientists determine the nature and extent of injuries to natural resources from spills, and the restoration actions needed to reverse these losses.

NOS experts also use scientific and economic studies to determine the level of restoration necessary to restore the natural resources and services they provide.

Tracking Contamination

When a disaster like a major oil spill occurs, one of NOAA’s important jobs is to measure and assess the impact on coastal and marine ecosystems so that measures can be taken to attempt to restore them to pre-spill conditions, and to provide information for natural resource damage assessment.

NOAA's National Centers for Coastal Ocean Science play a central role in this process by tracking contamination and its effects on the animals and plants that live in the areas impacted by a spill.

Scientists tracks contamination in several ways. First, they collect and maintain long-term monitoring data on contaminants measured in sediments, shellfish, and water for all U.S. coasts and the Great Lakes.

Shellfish are particularly good indicators of water quality because they concentrate pollutants from the water in their tissues as they feed.

When a spill occurs, NCCOS scientists attempt to collect sediments and shellfish before the spill hits the shore.

If oil reaches the shore, scientists will collect sediments and shellfish for a second time.

The difference between these two measurements indicates how much contamination can be attributed to the spill.

Scientists also collect water samples to “fingerprint” the oil or chemicals from a spill, allowing them to distinguish that oil from contamination coming from other sources.

NCCOS scientists also try to pinpoint which areas may have been most affected by a given spill. They do this by looking at the creatures that live in the sediment and analyzing whether or not the sediment has become toxic to these organisms.

This kind of “bioeffects” research helps scientists understand how contamination is affecting the food chain.

Oil along the New Orleans River Walk following a spill that happened Thursday, April 12, 2018. Image credit: U.S. Coast Guard.

View from above

For major spills, often the best perspective is from high above.

NOAA’s National Geodetic Survey (NGS) deploys to the scene of major spills to collect aerial images to capture a bird’s eye view of spill and coastal areas.

NGS uses NOAA aircraft outfitted with mapping sensors. Data acquisition typically focuses on the land-water interface in high-priority areas in an effort to protect wildlife and the shoreline.

NGS also provides remotely sensed imagery from previous mapping projects to help response personnel assess shoreline features that were present prior to the spill.

NGS has been collecting aerial photographs of our nation’s coast since the early 1900s.

Following an incident such as an oil spill or a natural disaster such as a hurricane, NGS photos provide emergency and coastal managers with information needed to develop recovery strategies, identify hazards, and locate errant vessels.

The images also provide documentation necessary for damage assessment through the comparison of before and after imagery.

These photos are not just used to support disaster response. NGS aerial photos are also used to define the national shoreline, create maps and charts, and monitor environmental change.

More than 500,000 photo negatives, dating from 1945 to the present year, exist in NOS archives and are maintained by the National Geodetic Survey.

Ocean observing

The U.S. Integrated Ocean Observing System (IOOS®) is a coordinated network of people and technology that compiles and distributes data on our coastal waters, Great Lakes, and oceans.

It includes partners at all levels of government, academic institutions, and the private sector.

Following a major spill, responders need information such as water levels, current speed and direction, wind speed and direction, and wave heights.

This information is collected by a variety of organizations (including NOS) using satellites, buoys, tide gauges, radar stations, and underwater vehicles.

IOOS helps bring this information together, so that it can be coordinated and made available to those who need it.

As an example, IOOS regional partners from the Gulf Coast, Southeast, Mid-Atlantic, Northeast, Southern California, and the Northwest are working in concert to provide data, tools, models, and other products to support BP Deepwater Horizon oil spill response efforts.

Part of this support involves the use of underwater unmanned gliders to assist in the tracking of oil flows at various levels in the water column.

Glider technology is unique in that it collects critical data throughout the water column at relatively low cost and at no risk to human life.

This is the first oil spill response in the U.S. where this technology has been applied.

IOOS is also using high frequency radar technology to measure Gulf of Mexico surface current speed and direction in near real time.

Data collected are incorporated into oil spill trajectory models.

On Feb. 26, 2018, oil was released into the Shuyak Strait in Alaska after an abandoned building collapsed.

Delivering data

Determining where oil or chemicals will move following a spill requires knowing how the water and wind are moving.

The Center for Operational Oceanographic Products and Services (CO-OPS) operates and maintains an extensive network of hundreds of coastal measurement systems around the nation that collect and provide this verified information.

The collected data are important to helping mariners safely navigate in and out of ports and harbors, so CO-OPS operates these systems year round, not just following an oil spill.

However, in support of major oil spill response efforts, CO-OPS may modify existing products to better meet the needs of responders and communities.

For example, CO-OPS delivers a product called Storm QuickLook to provide a synopsis of near real-time ocean and weather observations at locations when a hurricane is threatening an area. In response to the Deepwater Horizon oil spill, CO-OPS reengineered NOAA Storm QuickLook to include not only water level and weather data in potentially affected areas, but also a NOAA graphic showing the location of the oil spill.

CO-OPS also developed a specialized display of Physical Oceanographic Real-Time System (PORTS®) data from the Gulfport, Pascagoula, and Mobile Bay PORTS.

Using MyPORTS, a customizable PORTS® application, CO-OPS created a display of current speeds and directions, as well as weather observations in the region of the Deepwater Horizon oil spill.

Operated year round in 21 locations around the U.S., PORTS® measures and disseminates observations and predictions of water levels, currents, salinity, and weather information such as winds, atmospheric pressure, and air and water temperatures needed to support the safety and efficiency of maritime commerce and coastal resource management.

Charting the way

The oceans are trading routes for the planet. The U.S. exports over $11 billion worth of wheat, grown from Maryland to Washington, to 67 countries, with shipments from the East Coast, West Coast, Gulf Coast, and the Great Lakes.

And that is just one example. All segments of our economy rely on timely exports and imports. The safe movement of goods in and out of ports can't stop because of an oil spill.

To help mariners safely navigate following major spills, the Office of Coast Survey updates nautical chart products that display spill zone forecasts based on the best-available projections.

The charts depict the 48-hour forecast for oil location, juxtaposed against the standard safety fairways that lead to port approaches.

These electronic and raster charts alert ship captains to the location of the forecasted spill area, so that captains can take efforts to avoid the spill.

The U.S. Coast Guard also uses the chart information to develop instructions and alternative anchorages for vessels transiting U.S. waters.

A nautical chart depicts the nature and shape of the coast, water depths, and general topography of the ocean floor; locations of navigational danger and protected marine life; predicted tides; locations of human-made aids to navigation; and, in port areas, traffic separation schemes.

Ships transiting U.S. waters are required to carry nautical charts, which they use to plan their routes for intended voyages.

For over 200 years, NOAA's Office of Coast Survey has created and updated the nation's charts, providing mariners with the accuracy and precision they need to navigate the shortest, safest, and most economical routes.

Helping people

NOAA's Office for Coastal Management (OCM) helps communities prepare for and adapt to the impacts of major spills.

NOAA experts in OCM not only provide data, but also the tools, training, and assistance needed to turn these data into useful information.

Satellite imagery and socioeconomic findings represent the most requested data sets, and services provided include skilled facilitators who help affected parties come together to determine how to best address current and future oil-related impacts.

OCM also helps states prepare for the potential impacts of significant oil and chemical spills.

OCM administers the National Coastal Zone Management Program, a voluntary federal-state partnership that protects, restores, and responsibly develops our nation's diverse coastal communities and resources.

Through this program, experts provide technical and financial assistance and deliver federal updates, information, and contacts to to state coastal management programs.

OCM staff also help coastal managers prepare for the possibility of oil reaching their coastal waters and shores.

In addition, OCM administers the National Estuarine Research Reserve System, a network of estuarine areas established across the nation for long-term stewardship, research, and education.

Estuaries are crucial spawning areas for many commercial and recreational fish and shellfish, and they buffer upland areas from flooding and shoreline erosion.

Since the effects of oil in estuaries can be especially damaging, OCM maintains close contact with the regional reserves affected by spills to help them prepare for the possible landfall of oil or chemicals.

Their assistance includes serving as a clearinghouse to match existing expertise with specific needs at the affected reserves.

In addition, the reserve system provides a wealth of long-term environmental data that is used to support planning and modeling related to spills.

Pollution and People

The release of oil and chemicals into our coastal waterways is a major problem — for our environment in particular, but also for the people and communities that depend on the environment for survival, commerce, recreation, and culture.

 Marine pollution can affect the availability of food, particularly in the fishing industry. An oil or chemical spill also has the potential to shut down beaches or other recreational areas.

Closures such as this can put a damper on your vacation if you're a tourist or simply someone who enjoys taking advantage of natural recreational resources.

On an even larger scale, if you live in an area that depends on tourism for commerce, your entire local economy could be put at risk.

About the National Ocean Service

America's Coastal & Ocean Agency

Our Priorities

The National Ocean Service provides data, tools, and services that support coastal economies and their contribution to the national economy. NOS is dedicated to advancing the following priorities:

Safe and efficient transportation and commerce

Ships move $1.5 trillion worth of products in and out of U.S. ports every year. Every ship moving in and out of U.S. ports relies on navigation charts and water level information that NOS alone provides. All mapping, charting, and transportation activities and infrastructure are founded on a reliable, accurate national coordinate system. NOS is solely responsible for maintaining that system, which provides more than $2.4 billion in potential annual benefits to the U.S. economy. Businesses in the maritime community rely on NOS for a range of decisions, from how much cargo to load to choosing the safest and most efficient route between two points. They use NOS data, tools, and services to plan seasonally for ship schedules to service global trade more safely and efficiently as significantly larger vessels transit through U.S. ports as a result of the Panama Canal expansion.

Preparedness and risk reduction

Coastal communities represent a major economic engine for the United States. Immediate and potentially life-threatening events such as hurricanes, as well as long-term issues like high tide flooding, are real challenges to coastal communities. NOS brings a unique range of information and capabilities to help communities prepare for, respond to, and recover from these events. For example, NOS maintains the nation's network of coastal tide and water level sensors to provide real-time data that supports accurate weather forecasts, coastal storm and flood predictions, and tsunami warnings. NOS provides data and tools that enable businesses and coastal communities to better plan for and mitigate risk from changing conditions. The agency provides information and data to protect human health and coastal economies with early warnings of harmful algal blooms and other threats. Every year, NOS responds to natural disasters and more than 150 oil and chemical spills in U.S. and state waters, which damage environments and disrupt economies. As the authoritative resource for science related to marine debris, oil, and chemical spills, NOS provides responders with the information they need to understand the severity of a spill and where it will travel.

Stewardship, recreation, and tourism

The United States boasts some of the most important natural, cultural, and historical resources in the world—not just on land but under the water as well. The value of the U.S. coastal tourism and recreation industry in 2009 was $62 billion. NOS plays a critical role in protecting and promoting access to these special coastal and marine places. NOS is entrusted with the responsibility to manage a network of underwater parks encompassing more than 600,000 square miles of coastal, marine, and Great Lakes waters. Across all national marine sanctuaries, about $8 billion annually is generated in local economies from activities like commercial fishing, tourism, and recreation. NOS also partners with states to manage national estuarine research reserves, a network of 29 coastal sites designated to protect and study estuarine systems. The reserves reflect the rich diversity of environments along our coasts and Great Lakes, and provide places for education, recreation, and boosting local economies.

https://oceanservice.noaa.gov/hazards/spills/


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Environmental Consequences of Oil Spills

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https://puricare.blogspot.com/2020/07/environmental-consequences-of-oil.html

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Dredging

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https://puricare.blogspot.com/2019/12/dredging-dredging-is-removal-of.html

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Keep Digging

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https://puricarechronicles.blogspot.com/2020/04/keep-digging-there-is-well-of-blessing.html

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    Fracking

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https://puricare.blogspot.com/2019/06/fracking-fracking-process-starts-with.html

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Water Pollution

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https://puricare.blogspot.com/2019/06/water-pollution-environmental.html