Forest soil is the important source and sink of greenhouse gas in atmosphere. The main greenhouse effect gases, such as CO2, CH4 and N2O, are related to this system directly or indirectly.

森林土壤是大气温室气体重要的源和汇，主要的温室效应气体CO2、CH4及N2O都直接或间接与这个系统有关。

youdao

Abstract: greenhouse gases emissions are increased year by year, and greenhouse effect has become more serious.

摘要温室气体排放量逐年增加，温室效应日趋严重。

youdao

Add the fact that it has little or no effect on reducing greenhouse gases, and the case for something better becomes appealing.

ECONOMIST: Behind Detroit's sudden embrace of ethanol

These reflect sunlight away from Earth and thus oppose the effect of greenhouse gases.

ECONOMIST: Changing science

The warming effect caused by greenhouse gases rose 29% since 1990 and 1.4% over the last 12 months ending Dec. 31, 2010.

FORBES: Connect