emission formation

例句：

1. 1. The car's exhaust emissions are causing a lot of pollution.
   这辆车的尾气排放造成了很多污染。
2. 2.The scientist used a new technique to reduce the emission of greenhouse gases.
   科学家使用了一种新技术来减少温室气体的排放。
3. 3.The factory has been fined for illegal emissions of toxic chemicals into the air.
   这家工厂因向空气中非法排放有毒化学物质而受到罚款。