"ALMOST at an all time high" seems more fitting than "drastically reduced" when referring to a 20% reduction.

Your initial argument is that the USA "drastically" reduced emissions without harming the poorest part of the population, and my point is that it is simply not true. The USA produces the same emissions that it did 50 years ago, does it seem enough to you? The USA hasn't suffered from climate change policies because it has not put in place any meaningful climate policy.