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Deforestation has been a problem in Australia's forests, which causes significant changes in animal population.
https://www.rainforesttrust.org/news/australias-drastic-deforestation/

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Today, there is widespread concern that the ozone layer is deteriorating due to the release of pollution containing the chemicals chlorine and bromine.

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Deforestation:
https://earthobservatory.nasa.gov/Features/Deforestation/deforestation_update3.php

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From big pieces of garbage to invisible chemicals, a wide range of pollutants ends up in our planet's lakes, rivers, streams, groundwater, and eventually the oceans. Water pollution-along with drought, inefficiency, and an exploding population-has contributed to a freshwater crisis, threatening the sources we rely on for drinking water and other critical needs.

Research has revealed that one pollutant in particular is more common in our tap water than anyone had previously thought: PFAS, short for poly and perfluoroalkyl substances. PFAS is used to make everyday items resistant to moisture, heat, and stains; some of these chemicals have such long half-lives that they are known as "the forever chemical."

Safeguarding water supplies is important because even though nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh. And just one percent of freshwater is easily accessible, with much of it trapped in remote glaciers and snowfields.

Water pollution causes

Water pollution can come from a variety of sources. Pollution can enter water directly, through both legal and illegal discharges from factories, for example, or imperfect water treatment plants. Spills and leaks from oil pipelines or hydraulic fracturing (fracking) operations can degrade water supplies. Wind, storms, and littering-especially of plastic waste -can also send debris into waterways.

Thanks largely to decades of regulation and legal action against big polluters, the main cause of U.S. water quality problems is now " nonpoint source pollution," when pollutants are carried across or through the ground by rain or melted snow. Such runoff can contain fertilizers, pesticides, and herbicides from farms and homes; oil and toxic chemicals from roads and industry; sediment; bacteria from livestock; pet waste; and other pollutants.

Finally, drinking water pollution can happen via the pipes themselves if the water is not properly treated, as happened in the case of lead contamination in Flint, Michigan, and other towns. Another drinking water contaminant, arsenic, can come from naturally occurring deposits but also from industrial waste.

Freshwater pollution effects

Water pollution can result in human health problems, poisoned wildlife, and long-term ecosystem damage. When agricultural and industrial runoff floods waterways with excess nutrients such as nitrogen and phosphorus, these nutrients often fuel algae blooms that then create dead zones, or low-oxygen areas where fish and other aquatic life can no longer thrive.

Algae blooms can create health and economic effects for humans, causing rashes and other ailments, while eroding tourism revenue for popular lake destinations thanks to their unpleasant looks and odors. High levels of nitrates in water from nutrient pollution can also be particularly harmful to infants, interfering with their ability to deliver oxygen to tissues and potentially causing " blue baby syndrome." The United Nations Food and Agriculture Organization estimates that 38 percent of the European Union's water bodies are under pressure from agricultural pollution.

Globally, unsanitary water supplies also exact a health toll in the form of disease. At least 2 billion people drink water from sources contaminated by feces, according to the World Health Organization, and that water may transmit dangerous diseases such as cholera and typhoid.

Freshwater pollution solutions

In many countries, regulations have restricted industry and agricultural operations from pouring pollutants into lakes, streams, and rivers, while treatment plants make our drinking water safe to consume. Researchers are working on a variety of other ways to prevent and clean up pollution. National Geographic grantee Africa Flores, for example, has created an artificial intelligence algorithm to better predict when algae blooms will happen. A number of scientists are looking at ways to reduce and cleanup plastic pollution.

There have been setbacks, however. Regulation of pollutants is subject to changing political winds, as has been the case in the United States with the loosening of environmental protections that prevented landowners from polluting the country's waterways.

Anyone can help protect watersheds by disposing of motor oil, paints, and other toxic products properly, keeping them off pavement and out of the drain. Be careful about what you flush or pour down the sink, as it may find its way into the water. The U.S. Environmental Protection Agency recommends using phosphate-free detergents and washing your car at a commercial car wash, which is required to properly dispose of wastewater. Green roofs and rain gardens can be another way for people in built environments to help restore some of the natural filtering that forests and plants usually provide.

This story was updated on January 24, 2020.

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From big pieces of garbage to invisible chemicals, a wide range of pollutants ends up in our planet's lakes, rivers, streams, groundwater, and eventually the oceans. Water pollution-along with drought, inefficiency, and an exploding population-has contributed to a freshwater crisis, threatening the sources we rely on for drinking water and other critical needs.

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https://goo.gl/wcEMkh

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Forests are dying and stuff so check it out if you want to.

https://www.worldwildlife.org/threats/deforestation

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An estimated 6 trillion pieces of trash are currently in the ocean, this is very toxic to wildlife that we use as food and make up the ecosystem.

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The ozone layer is a belt of the naturally occurring gas "ozone." It sits 9.3 to 18.6 miles (15 to 30 kilometers) above Earth, and serves as a shield from the harmful ultraviolet radiation emitted by the sun.
BUT...
Today, there is widespread concern that the ozone layer is deteriorating due to the release of pollution containing the chemicals chlorine and bromine.

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Factory Pollution:

An estimated 3.5 million tons of trash resides in the Pacific Ocean.

Ground-level ozone has dropped by 11% throughout the United States from 2000 to 2010. There is an overall reduction of 28% in ground-level ozone since 1980.

40% of America’s rivers are too polluted for fishing, swimming, or aquatic life.

To solve this problem many factories have changed their ways of disposing of waste, this has helped but we need more change

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Tim Chrissinger-Deforestation In The Amazon

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Tim Chrissinger-Deforestation In The Amazon

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In the Amazon Rain forest, logging companies are cutting down the trees, destroying many species' habitats, and not replanting said trees. Around 137 species go extinct each day to deforestation, and around 25000 a year. These species could have the key to curing diseases, like cancer or HIV.

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Litter holds toxic substances that are being disposed into water and on land. Marine litter washes onto beaches, damages boat motors, gets caught in fishing nets, and impacts marine life/birds. Land litter is everywhere. It increases vehicle accidents and harms plants/animals. Land litter can be lead into the water.

Link- http://education.seattlepi.com/littering-affect-environment-6802.html

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Fresh water is the end point for biological waste. This includes human sewage, animal excrement, and rainwater runoff which has fertilizers from lawns and farms. These fertilizers find their way through river systems into seas which cause coastal ocean zones void of oxygen and therefore aquatic life suffers.
LINK:  http://www.nationalgeographic.com/environment/freshwater/pollution/

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Since our Earth crust is covered in 30% of forests, and it is estimated that in 100 years there will be no rain forests, this is a problem. Trees aren't just standing there for nothing, they're producing oxygen during photosynthesis for us. As we exhale, carbon dioxide is released in which trees take in. Without trees, would we breath? We may still be able to, but imagine how hard it would to. Especially with over- population, how scary does that seem? Trees also provide habitats for animals and provide food. Lets stop destroying forests for new homes and agriculture and think about others than just ourselves!!!!
http://www.conserve-energy-future.com/various-deforestation-facts.php

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Mr. Samuel E. Starrs : MERCURY IN SEAFOOD

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Mr. Samuel E. Starrs : MERCURY IN SEAFOOD

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Overtime mercury from coal plants and factories has collected in the air and found it's place in the ocean. Fish and other seafood absorbed the mercury into their bloodstreams and it has since spread throughout the massive food web of the ocean. With all of this mercury in seafood, it has become dangerous for humans (or anything) to eat too much of it because mercury is a toxic chemical.

LINK: https://www.nrdc.org/stories/mercury-guide

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Recent studies has shown that earth is changing its climate due to humans. Scientist call this the greenhouse gas effect. Humans have been putting chemicals like car exhaust that gets stuck in out atmosphere and warms up the air.

LINK: https://climate.nasa.gov/evidence/

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Greenhouse Gas Emissions - Aryan Kalathiya

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Greenhouse Gas Emissions - Aryan Kalathiya

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A Greenhouse allows plants and crops to be grown all year long. For Instance, it is made of glass and the glass allows light to come in and warm plants and air inside. But, the glass blocks infrared light which makes the heat from the sun, stay in the greenhouse. Earth's atmosphere does the same exact thing as a greenhouse. For Example, During the day, the Sun shines through the atmosphere. Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing the heat back into the air. But some of the heat is trapped by the greenhouse gases in the atmosphere. If the greenhouse effect is too strong then there will be a tremendous amount of global warming. Too much carbon dioxide and other greenhouse gases in the air are making the greenhouse effect stronger. However, there are many ways we can reduce the amount of greenhouse gas emissions. We can use renewable energy. For Example, More than half the electricity in the United States comes from polluting coal-fired power plants. And power plants are the single largest source of heat-trapping gas. Fortunately, the use of alternative energy sources, such as solar, wind, geothermal, and hydro energy, is gaining increased support worldwide. The wind energy produced in Denmark, for example, provides about 10 percent of the country's total energy needs. These methods of energy production emit no greenhouse gases once they are up and running. This will emitt less greenhouse gases and reduce the amount of global warming.

https://climatekids.nasa.gov/review/greenhouse-effect/

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The current ways of producing energy causes a lot of pollution and contributes to the green house effect. There are many other ways of producing energy such as, solar, wind, ocean, geothermal, biomass, hydroelectric, and hydrogen energy would be cleaner ways of producing energy and new ones could still be discovered.

Link:
http://www.conserve-energy-future.com/alternativeenergysources.php

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China is of of the biggest manufacturing countries.  All of this has caused smog to build up in big cities. The level of smog is unsafe for people to live in. This could be prevented if less factories were used, and less pollution happened.
http://www.sciencemag.org/news/2017/03/why-china-s-smog-so-bad-researchers-point-far-away-melting-arctic

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The Ozone is a layer 18.3 miles above the Earth that protects us from harmful radiation and UV rays produced by the sun. Recently humans on Earth are destroying our most important barrier due to pollution. Since the Ozone is deteriorating the temperature on Earth is getting warmer and warmer since we are getting more exposure to the sun. With more exposure from the sun the ice in arctic zones are melting and destorying the habitat for arctic animals. NASA stated that since 1880 the temperature has gone up by 1.7 degrees.
LINK:
http://www.nationalgeographic.com/environment/global-warming/ozone-depletion/
https://climate.nasa.gov/

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Waste disposal is a current problem that we are dealing with. There is lots of litter in the ocean, and toxins from land fills effect those who live near them. People who live near land fills don grow as much as those who live away from land fills. The gases released from the litter causes this. Also, when litter gets into our oceans and other bodies of water, it can kill or injure species. The main cause of waste disposal is too much consumption.

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Global warming is pretty much over polluting in the air which is causing the earths temperature to slowly rise. This is a serious problem and needs to be fixed before it is too late. Over the past 50 years, the average global temperature has increased at the fastest rate in recorded history. If this keeps up the average U.S. temperatures could increase by up to 10 degrees Fahrenheit over the next century. This is very harmful toward the environment showing that us humans pollute the air so much that it causes the temperature to rise. Us humans need to look toward more environmentally friendly solutions with one being that we need to switch to electric cars, solar panels, and decrease the amount of energy used at home. This will cause less air pollution and lets us have  a chance to stop global warming before it is too late.

https://goo.gl/blNFFC

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Overfishing occurs when more fish are caught than the population can replace through natural reproduction. Gathering as many fish as possible may seem like a profitable practice, but overfishing has serious consequences. The results not only affect the balance of life in the oceans, but also the social and economic well-being of the coastal communities who depend on fish for their way of life.Many fisheries and/or fishermen are fishing too many fish.  Fish levels are going way down because of over fishing. The collapse of the Atlantic Cod Fishery is one such example of how humans have exploited the planet’s natural resources to the brink of extinction. There are now way more species of fish and marine animals that are in large danger of being extinct because of over fishing. Without better control of these important resources, many of the species which humans depend on for sustenance will become unavailable as a food source. The world must do more to sustainably manage fishing if we’re to address increasing global demand for protein in the coming decades. If the situation doesn’t improve, millions of people may no longer be able to afford fish by 2050. Some factors are, lack of protected areas, illegal fishing, and open access fisheries . we need to limit the amount of fishing and add more protected areas https://www.worldwildlife.org/threats/overfishing

http://csglobe.com/10-environmental-problems/