But these are dirtier , more expensive and exacerbate climate change .

但后者更脏、更贵，而且会加重气候变化。

Our school is a lot dirtier since we fired the janitor .

我们学校自从开除了清洁工之后变脏了许多。

Their grubby success will make business look dirtier still .

但他们肮脏的发迹仍然会让商业看着更肮脏些。

Firms in other , dirtier industries may not compare against philanthropy so well .

其他污染更严重的公司在慈善上也许无法与之相比。

My place has gotten dirtier .

这里比以前脏多了。