2 ms·After two weeks the air over Europe will be cleanest since the long long long time ago.by rimliu 7y agoAfter two weeks the air over Europe will be cleanest since the long long long time ago.kentosi 7y agoNot just Europe, but also China and a host of other countries I bet.KarlKemp 7y agoConsidering the progress made over the last decades, we are probably setting new records (since the industrial revolution) for clean air constantly.