So the spreadof agriculture could very well have a profound effect on the composition of Earth's atmosphere.
所以农业的扩张很可能对地球大气的组成产生深远的影响。
2
The overall effect, however, was the spreadof confusion among the public and an increase in doubt about climate change.
尽管如此，其总体影响在民众中间传播了困惑，并增加了人们对气候变化的怀疑。
3
Mass chemoprophylaxis is strongly discouraged, as it has no effect on the spreadof cholera, can have adverse effects by increasing antimicrobial resistance and provides a false sense of security.