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Recently, when asked about whether human activity has positive or negative infulenced to our earth. Different people have their own understanding depend on distince personal experience or background. Some people say that human activity has destoryed our earth. Others assert that human activity makes the earth a better place to live. As far as I am concerned, I agree with the former opinion, there are some reasons to be demonstrated as follows:

For one thing, no one can deny the fact that natural resources of our earth will be progressively disappeared by human activity. Because over exploration caused much natural unrenewable resources on the edge of exhaustion. With development of industrious and economics, a number of factories such as large-scale metal-refining factories, oral companies need to consume a large amount of oils, wood,natural gas or other types of resources. Some experts analyze that many kinds of resources will be used up in next century in term of velocity of development. At that time, we would not find a piece of wood, a drip of oil to support our large-scale machines if we continuously explore our natural resources and can not find a new resources instead of traditional energy.

Another problem is that enviroment pollution caused by human activity should be also attentioned. Our enviroment has faced serious threaten. For example, in recent year, there are more and more companies decide to engage in oral exploration. But they always lack of consciousness of enviroment protection, thus it is caused that our forest has disappeared, blue sky will never be seen again, and water was no longer suitable for drinking. All of these make our earth become a place which is not suit for human living.

In addition, war has also brought great harmfulness to our earth. Our land, house, and plant, have been damaged by bomb at some extent because of confliction among countries of the world.

To sum up, due to the above mentioned reasons which sometimes correlate with each other to form an organic whole and thus become more persuasive than any single one of them, we can safely reach the conclusion that we should protect our earth through practical actions because earth is our most beautiful hometown.