> They're using natural gas to generate electricity.

Yep. And that will decrease air quality locally, which is especially bad for people with asthma or other sensitivities. And increases greenhouse gases globally. And this natural gas generator will probably be less efficient than a normal power plant.

> This is economic growth and a good thing.

Not much. Sure, there will be some construction jobs while it is being built, but after that, there won't be many jobs for the DC. And there is a good chance the jobs that will exist won't go to local residents. And the owners of the DC aren't going to be buying much if anything from the local community.