VIETNAM FORESTRY UNIVERSITY
WATER POLLUTION NOWADAYS
As a matter of fact, water covers over 70% of Earth’s surface and it’s a very important resource for people and the environment. But nowadays, water is polluted. And water pollution affects drinking water, rivers, lakes and oceans all over the world. This consequently harms human health and the natural environment . If we don’t have any methods to prevent water resource from polluting, we will not have enough water to use in the future. Water is polluted by a lot of causes. First of all is the industrial waste. Industries cause huge pollution with their activities. These come mainly from sulphur, asbestos, lead and mercury, nitrates and phosphates, oils… Firstly, sulphur is a non-metallic substance that is harmful for marine life. Secondly, asbestos is the pollutant which has cancer-causing properties when inhaled, it can cause illnesses such as asbestosis and many type of cancer. Thirdly, lead and mercury are metallic elements and can cause environmental and health problems for humans and animals. It’s even more poisonous. It’s usually very hard to clean up from the environment once it gets into it because it is non-biodegradable. Beside, nitrates and phosphates are also the poisonous. There are found in fertilizers, are often washed from the soil to nearby water bodies. They can cause eutrophication, which can be very problematic to marine environment. Lastly, oil forms a thick layer on the water surface because it does not dissolve in water. This can stop marine plants receiving enough light for photosynthesis. It’s also harmful for fish and marine birds. Sewage and waste of water are also causes of water pollution. Every day, we cook, do laundry, flush the toilet, wash our cars, shower and do many things that use water. Think about how we use water in school, hospitals and public places. Where do you think all the water, liquid waste, toilet and urine end up? In many developed countries, all this...
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