Recognition of the danger created by ozone reduction has led to a global ban on chlorofluorocarbon (CFC) production. Although it will take a long time for the ozone to return to 1970s levels, thanks to the research that led to early recognition of the problem and the steps have been taken to solve it, the possible consequence are much less severe than they would otherwise have been.
いくつか訂正してください。
1970年→1970年代
問題認識→早期の問題認識
初期の研究→研究
分かりました。
ありがとうございます。