human
I've been hearing a lot about fracking, but I don't know much about it.
assistant
Fracking is the process of drilling and injecting fluid into shale rock formations to release oil or gas. It's controversial because it can cause earthquakes, pollute groundwater, and release methane, which is a powerful greenhouse gas. The environmental impacts are still being studied, so there's no clear answer yet on whether or not fracking is good for the environment.