3．对民众进行普及性教育 4．加强了国际间相互合作
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注意：1.不要逐条翻译。 2.文章的开头部分已给 3.可适当发挥。 4.词数：120左右。
One possible version:
The idea of sustainable development has been accepted by the world.
How to keep sustainable development is a big problem facing our planet.
The present situation is worrying. First, natural resources are
becoming more and more scarce. Second, as some people are not aware of the
importance of the environmental protection, the problems with it remain
extremely serious to some degree. The gap between the rich and the poor has the
tendency to become wider and wider.
To our great joy, many countries have taken action. On one hand,
they have made relevant laws and regulations and put large amounts of money to
the environmental protection. On the other hand, popularized education as well
as international cooperation is being carried out.
As to myself, I should take the responsibility to devote myself to
sustainable development, because we have only one home.……