填空题

The Greenhouse Effect is generally believed to come from the ______in the atmosphere.

【参考答案】

buildup of carbon dioxide gas
<上一题 目录 下一题>
热门 试题

填空题
Smog is caused by chemical reactions between pollutants derived from different sources, primarily automobile exhaust and industrial emissions.
填空题
The water (or snow) can become acidified when a pollutant combines with______ in the air.
相关试题