TOEFL Essay: The Earth being harmed by human activity

[Konstantin]

Hello!
Could you revise my essay?

Question:
Some people believe that the Earth is being harmed (damaged) by human activity. Others feel that human activity makes the Earth a better place to live. What is your opinion? Use specific reasons and examples to support your answer.

Answer:
Human beings are the most exciting children of the nature but at the same time they injure severely their own mother. I suppose that human activity changes the face of the Earth dramatically and the result of such activity we could see in the effects like extinction of very many species and global warming.

Global warming is one of the most visible effects of mankind’s operations. The greenhouse effect is the increasing of the global temperature because of carbon dioxide emission into the atmosphere. Since the green plants use the carbon dioxide during the photosynthesis some scientists believe that greenhouse effect may have advantages like the bigger amount of the yield. But most scientists guess that the change of climate has had the negative consequences: modification of air composition, melting of icecaps and flooding of the great amount of dry land. We could maintain the balance by increasing the amount of forests but we act in the opposite way.

As the result of human actions several hundreds of species have became extinct every year. Some rare species destroyed by the guns, some by the pollution. For instance there were millions of bisons in the North America, but after the arriving of the civilization you could see these mighty animals only in the reserves. You could suppose that the reserves are the excellent solution but they are only the drops in the ocean. Another example is the change of the ecosystem of the world’s biggest fresh lake. After the building the paper producing factory on the Baikal’s shore many species of fishes became extinct because of tremendous water pollution.

Since the mankind need in more energy and food it starts to transform the nature too fast. Some time we will realize it and I believe it will not be too late.