two causes of water pollution
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Answer:
Wastewater and Sewage
The wastewater and sewage that is produced by every home is treated with chemicals and then released into the sea. This sewage carries bacteria and chemicals that pose a serious health risk. Waterborne pathogens, such as E. coli, cholera, campylobacteriosis and others are also a water pollution risk. These pathogens are a mix of microorganisms that are the cause of many deadly diseases. Their existence also acts as a breeding ground for creatures and parasites that spread the disease. Possibly the most well known example of this is the relationship between malaria and mosquitos.
2. Industrial Waste
Some industries, produce an enormous amount of toxic waste that is laden with pollutants. Some of these pollutants are released into the environment as air pollution. Others are drained into fresh water that is then introduced into canals, rivers and eventually the sea. Some of the most common chemicals are lead, sulfur, mercury, asbestos, and nitrates. These chemicals can change the water color and temperature. They also cause Eutrophication, which is an increase in the mineral content of the water. These chemicals are hazardous to local flora and fauna, including fish and other water borne organisms.
3. Fossil Fuels
The burning of fossil fuels, such as coal and oil, produces ash that is released into the atmosphere. The particles are toxic when they become mixed with water vapor in clouds they cause acid rain. Additionally, when fossil fuels are burned, carbon dioxide is released, which is a contributor to global warming.
4. Sewer Line Leaks
Even a small leak in a sewer line can cause the surrounding groundwater to become contaminated. This will make the water unfit for human consumption. If the sewer line is not repaired for a while, other problems will occur. Leaking sewer water will eventually find its way to the surface, and it will become a breeding ground for mosquitoes, a particular issue these days with the recent arrival of the Zika virus to the continental United States.
5. Fertilizers and Pesticides
Many fertilizers and pesticides are chemical products that are used by farmers to protect their crops. They are beneficial for plants because they protect against attacks from insects and harmful bacterias. Unfortunately, when these chemicals are mixed with rainwater they can become a problem as they flow off the land into streams, rivers, and canals. They are harmful to both animal and plant life. Eventually, they will make their way to the water sources where they damage aquatic life.