Question 1
The best way for the farmer to manage her soil to prevent problems like the Dust Bowl is:
allow plants such as grass to take root in it to anchor the soil.
Question 2
The two congressional acts that helped to reduce factory pollution are:
Clean Water Act and Clean Air Act.
Question 3
Based on the graph's trends since the Clean Air Act was revised in 1990, the correct response is likely:
Some emissions significantly increased, while others decreased or stayed the same.
(Note: The responses for Questions 2 and 3 are based on common knowledge, as I do not have access to a specific graph for Question 3.)