第一次做饭英语作文1400字篇22

People used to cut down trees to burn and get fire,it has made trees become fewer and fewer.Also they burn lots of coal ,then the air in cities are polluted.But now,people in countries are used to using CO and CH4,then the hills become more green and rivers become cleaner.Also cities use election and CH4，the environment become better.I hope our planet will less and less pollution and become better and better.