Rephrase the main idea of the sample in your own words, without repeating words or sentence structure from the original statement. (I honestly can't seem to decide on how it should be worded)
"Air pollution can also have a significant impact on our economy. It can cost a lot to change what we buy, what we use, and how it is produced in order to prevent air pollution. Economic costs are also found in fixing the damage caused by poor air pollution, including health and environmental problems."
Try starting out like this:
Changing people's purchasing and usage habits ...