The externality theory is a basic theory of explaining economy activities and forest ecological environment problems.
本外部性理论是解释经济活动与森林生态环境问题的基础理论。
The comprehensive benefits of society, ecology and economy can be acquired from improving ecological environment by means of comprehensive utilization of the small-sized reservoir.
小型水库的综合利用，可以改善当地的生态环境，带来社会、环境、经济的综合效益。
Meanwhile the negative effects of climate change on China's ecological environment and social economy are significant.
同时，气候变化对我国生态环境和社会经济的负面影响也日渐突出。
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