A couple of things: If there isn't any human health problem with the chemicals drillers are using to collect natural gas stored in shale rock formations, like Marcellus in Pennsylvania, then why so much secrecy? Trade rules? Right. And not. We humans continue treating the Earth - our only planet - as an infinite source of "resources." it is not. I suggest a couple of fixes right off: Put a nice warm sweater on when the weather turns cold; turn the thermostat down (I get by with a setting of 60 and I am in northern Vermont!); and get up and move around. There is nothing worse than camping out in front of the boob tube.
Natural gas drilling - just like myriad other human activities - destroys and fragments habitats needed by all the other life the Creator placed on Earth. And w show our reverence for this biological diversity by wrecking it? The NY Times reports on the Obama administrations latest compromise on gas drilling on federal public lands. Sad.