Ummm... it has caused water pollution an it does cause earthquakes. These are facts. The water contamination can be controlled and the earthquakes are minor and of no consequence. The problem is, there is a right way to frack and there are horrible ways to frack. Unfortunately, without proper regulation and monitoring, the free market will select the horrible way to frack and water supplies will be ruined.
The best solution of course is not an outright ban on fracking, but rather close monitoring and real liabilities for those that engage in it. However in the whipped up hysteria of the sky is literally falling and killing us climate change environment, all things carbon is bad, so the ban is super duper good. Realistically since nobody really wants the pain of life without carbon, the US would like to do what it has historically done for decades and just export it's pollution to lesser countries.
Prove it. I have yet to see a credible article about water pollution from fracking, though there is plenty from the panty wetters who have an axe to grind.
Fracking happens much, much deeper than any ground water or acquifer.
As for earthquakes, I don't think so. It does cause tremors, but I've heard that those are actually beneficial as they relieve pressure. However, I've just told you my sum knowledge of earthquakes.