Fresh water is the most important source of life on the earth. Any living thing may survive without food for days however it is impossible to imagine life without water and oxygen. The ever increasing human population enhances the demand of more water for purposes like drinking, washing, performing industrial processes, irrigating crops, arranging swimming pools and other water-sports centres. Water pollution is done by the people of all over the world because of increasing demands and competitions of luxuries life. Waste products from many human activities are spoiling the whole water and decreasing the amount of oxygen available in the water. Such pollutants are altering the physical, chemical, thermal, and biological characteristics of the water and adversely affecting the lives inside as well as outside the water.

When we drink the polluted water, harmful chemicals and other pollutants goes inside our body and deteriorates all the body organs functioning and puts our lives in danger. Such harmful chemicals also disturb the lives of animals and plants greatly. When plants absorb dirty water through their roots, they stop growing and die. Thousands of seabirds are killing because of the oil spilling from ships and industries. High level of water pollution is done due to the chemicals coming out of the agricultural usage of fertilizers, insecticides and pesticides. The effect of water pollution varies from place to place upon the type and amount of water contamination. The degradation of drinking water needs an urgent basis prevention method which is possible by the proper understanding and support from the end of each and every person living on the earth.

1.Water Pollution is mainly caused as a result of improper discharge of household and industrial chemicals wastes into the water bodies.

These dangerous chemicals (in the form of solid, liquid or gases) mixes with water and make it unsafe for living bodies. Water pollutants cause harm to human-beings, animals, trees and other constituents of environment.

The sources, effects, and control measures of Water Pollution are discussed below.

Effect of water pollution on human health Presence of toxic metals in water may cause skin disease, dysentery, amoebiasis, anorexia, etc. Radioactive substances present in water may lead to radioactive pollution causing cancer. In polluted water the different water borne virus, bacteria, and protozoa are present. They cause small diseases likely pox, chicken pox, dysentery, amoebiasis, tuberculosis etc. Control of water pollution The toxic industrial and agricultural runoff should be properly treated before mixing with water sources. Drinking water should be properly treated to make it free from any germs. The sewage system should be much more scientific. The waste water should be purified before it goes to the river. The toxic chemicals from industries should be properly treated prior to discharge into the environment. Cultivation of Salvinia and Azolla in the pond or lake can fix toxic metal and hence metal pollution can be reduced. The domestic or household effluents should be discharged properly.

Water Pollution is the contamination of water bodies. It occurs as a result of introduction of pollutants in water. Water is life. Still, we contribute in polluting the water bodies in several ways.

Water Pollution is mainly caused as a result of improper discharge of household and industrial chemicals wastes into the water bodies.

These dangerous chemicals (in the form of solid, liquid or gases) mixes with water and make it unsafe for living bodies. Water pollutants cause harm to human-beings, animals, trees and other constituents of environment.

Speak

Tk:

Nowadays, many people spend a lot of time watching television. It can't be denied that since television was invented, it has changed our lives in many ways, and brought us many advantages as well as disadvantages.
Television plays an important role in our daily life. It's very informative. Through television, we can get the latest information easily and rapidly without leaving home. We can learn more and more about the world we live in and see many interesting things. Our knowledge is broadened in many ways.
Secondly, television helps us to enrich our spiritual lives. In particular, we can learn the language we like such as English, Chinese, France, Spanish, Japanese.....through language programs. We can be good and clever at doing jobs, making cake, cooking, arranging flowers through the practical course which is taught on television.
And watching is an enjoyable way to relax. After a hard-working day, it's so comfortable and fun to sit in the armchair and see a movie or watch a comedy program. There are also educational programs on television, so children can learn a lot from these programs.
On the other hand, television has some disadvantages. It has negative effects, especially for children. Some movies contain violence or crime. Therefore, the evil influence of television on the young generation is inevitable. It encourages them to commit the crime, or make children grow up to be violent adults.
What's more, watching television too much makes us passive. When watching TV, our brains don't need to work. Therefore, our brains become lazier. Watching TV too much is also bad for our eyes. This is the main cause that leads to short-sightedness.
All things considered, everything has two sides, advantages, and disadvantages. Television will be useful to us if only we know how to use it sensibly.

#Tham khảo

Nowadays,many people spend much time watching television.It can't be denied that since television was invented,it has changed our life in many ways ,and brought us many advantages as well as disadvantages. Television plays an important role in our daily life.It's very informative.Through television,we can get the latest information easily and rapidly without leaving home.We can learn more and more about the world we live and see many interesting things.Our knowledge is broadened in many ways. Secondly,televiosin helps us to enrich our spiritual lives.In particular,we can learn the language we like such as English,Chinese,France,Spanish,Japanese.....through language programs.We can be good and clever at doing jobs,making cake,cooking,arranging flowers through practical course which is taught on television. And watching is an enjoyable way to relax.After a hard-working day,it's so comfortable and fun to sit at the armchair and see a movie or watch a comedy program.There are also educational programs on television,so children can learn a lot from these programs.

Being a volunteer is one of the best things you can do with your life. It's a great way to help other people. It's also very satisfying to know that you are not wasting your time and are helping people who need help.Many of us could and should be out there doing voluntary activities of some kind. So many volunteer organizations need extra hands. It really is easy. Just pick up the phone and offer your services.I think too many of us settle into a lazy lifestyle. We just want to come home and watch TV. Life is much more interesting when you're a volunteer.I've found it really opens your eyes to how some people live. It's sometimes sad to see how the government lets people down, but at least I'm doing my bit

Tham khảo:

In Vietnam, almost everyone, has been a volunteer work and I have too. At my age, I have not been donate blood so I often donate books, toys and clothes for street children and homeless people. I often do this work with my mother. Latest here on Sunday, I with my mother was used to donate books and clothes for a charity organization. In here, I met the orphans children. I played with them. Then I gave candies to them. They were all very happy.Some people think doing volunteer work is waste of time but in my opinion, doing volunteer work help me relax after school and it help me healthy. When I doing this work, I feel very happy to bring happiness to them.