Write-down of two-thirds of US shale oil explodes fracking myth

I called this a few years ago.  As extraction rates rise, half-lives shrink.  It's not rocket science to understand that as drilling becomes more efficient and prodigious, the half-lives of the resource declines.

http://www.theguardian.com/environment/earth-insight/2014/may/22/two-thirds-write-down-us-shale-oil-gas-explodes-fracking-myth