For example I feel that fast food and an unhealthy lifestyle leads chronic health problems that probably affects the economy not just monetarily.
Of course we can't just deny these people care, just promote a healthier lifestyle.
What are other things that we can change that will affect the economy in a positive way?
Economy means the financial health of a country so infrastructure and other means of businesses is not a damage to economy. Though it has a negative effect on the environment but not in the economic standard of the nation.