Methane in Penn. water: http://www.usatoday.com/tech/science/environment/2011-05-09-fracking-environment-water-methane_n.htm?kjnd=tdhCGLuJNw0W9cwvSTnR3S5Wazu3TDhPDJ4KGotJ5EcJyU8aKCtnY2wMRohGN0e%2B-f496f3d7-d5ec-4a5f-8798-0d531ae0abba_gsZCpGGQ5PG4KO88pmEQvOfJqLd90%2BHZ/eEqqD1gG2sycV7wmJcNSb7MQ7eRZqPU&dlvrit=206567