Rehder the word

Here are the reordered words to make full sentences: 1. What would you really do if you got bad air pollution? 2. If we recycle more rubbish, we will have less to landfill sites. 3. Too much electric lights use in cities cause pollution. (Note: I corrected 'lihhts' to 'lights', 'yyal' to 'you', and 'ollln' to 'pollution' as it seems there was a typo in the original sentence.) Alternative correct sentence: 3. Too much use of electric lights in cities causes pollution. 4. If we don't waste paper, we will save thousands of trees.