Hurry please help fill in the box where it says explanation where it says before, during, and after! And I need a good explanation thanks :) Before

During

After

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

Which is the correct formula for photosynthesis

The united states uses which source of energy to produce almost 40 percent of its electricity