Agriculture is one of the important greenhouse gas emission sources.
农业是重要的温室气体排放源。
Cropland is one of the greenhouse gas emission sources, but also a possible sink at the other side.
农田既是主要的温室气体排放源之一，也是潜在的碳汇。
This paper discusses the principles of forecast from different sources, and introduces the application in the new mine gas emission forecast through examples of calculation.
论述了分源预测法原理，并通过实例计算介绍了该方法在新建矿井瓦斯涌出量预测中的应用。
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