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United States is the largest industrial country in the world, it contributs one forth of the global greenhouse gas emissions. Therefore, ot is obliged to contribute to the reduction target set by " Kyoto Protocol " . The United States government refused to sign the protocol, which leads to the lesser effectiveness of the Protocal, and harms the common benefits of the human kind to improve the environmental conditions. It also affects the international environmental affairs and damanges the image of the United States of America.

It is well known that the the green house gas is harmful. The earth is the common home of mankind. The United States' refusal to sign the " Kyoto Protocol " endangers the world and also endangers itself.

So, the United States shall pay attention the interest of the human kind and actively envolved in improving the living environment of human kind and sign and observe the "Tokyo Protocal".

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United States is the world's largest industrial country, which contributes to 1/4 of the global greenhouse gas emissions. USA can not shirk its obligations of reducing emisssion to achieve " Kyoto Protocol " provisions. Refuse to sign the protocol brings down real effectiveness of the protocol and gets cmpromised the common interests of human being aiming to improve environment. Meanwhile, it greatly affects international environmental affairs and damage greatly the image of the United States of America.

It is known to all that greenhouse has a lot of damages. The earth is the common home of all mankind. USA'S refuse to sign the " Kyoto Protocol " not only endangers the world, but also themselves.

In a word,the United states should abide by and sign the " Kyoto Protocol " for all people's interests and actively participate in the improvment and protection of the environment.

通顺完整了。

The United States is the biggest industrial country in the world, and its greenhouse gas emission is a quarter of the world’s total. In spite of such a mandatory obligation to emission reduction, the refusal to sign the “Kyoto Protocol” by the U.S. government has discounted the effectiveness of the Protocol, and compromised mankind’s common interest of improving the status of
environmental protection. This inaction of the United States has affected the international environmental affairs and tarnished its image as well .
It is a common knowledge that the greenhouse effect can cause a lot of damages.
The earth is the homeland of all mankind; the refusal to sign the “Kyoto Protocol” by the United States not only does it endanger the world, but also itself. Therefore, the United States should place the common interest of mankind at heart, and actively participate in the improvement and protection of the human living environment by signing and abiding by the “Kyoto Protocol".

【英语牛人团】

United States is the world's largest industrial country, which contributes to 1/4 of the global greenhouse gas emissions. USA can not shirk its obligations of reducing emisssion to achieve " Kyoto Protocol " provisions. Refuse to sign the protocol brings down real effectiveness of the protocol and gets cmpromised the common interests of human being aiming to improve environment. Meanwhile, it greatly affects international environmental affairs and damage greatly the image of the United States of America.
It is known to all that greenhouse has a lot of damages. The earth is the common home of all mankind. USA'S refuse to sign the " Kyoto Protocol " not only endangers the world, but also themselves.
In a word,the United states should abide by and sign the " Kyoto Protocol " for all people's interests and actively participate in the improvment and protection of the environment.