You'll probably always have more turnover do to noise, pollution, safety and security. 

Borrego Springs had an incredible super bloom this spring.The Salton Sea area has an air pollution problem from chemical spraying from nearby farms and the town surrounding the sea is very run down.

Less traffic, pollution, people, etc.  

I've had guests dump ashes into the bluff, which drains to the lake and can pollute it. 

Asbestos, radon gas, oil, run off contaminants, pollution in water, etc.

@Phil WellsWe know New York is a disease infested, dense, polluted, expensive and terrible place to live.

Unprocessed anger pollutes the social sphere.

I agree with Mike...noise pollution is something the neighbors didn't sign up for and i think it's important to address the issue.

Now I'm realizing that for this whole idea to fit in line with my values I'd really like to use my investing to not only create a passive income for myself but also to contribute to making low socioeconomic urban neighborhoods better, particularly for kids who grow up in those areas, like helping them be less exposed to toxic substances and pollution, or have safer neighborhoods to play in, or more access to health/education resources. 

You want to pollute your lungs, you're addicted I get it but Butts are trash don't throw on the ground or out your car window...