Another problem he cites is the pollution of soil and water in the process -- hydraulic fracturing, or fracking -- which involves injecting large amounts of water, sand and chemicals into shale rock formations at high pressure to force out oil and natural gas.
Drugi je problem koji spominje zagađenje tla i vode uslijed postupka hidrauličkog lomljenja, koji uključuje ubrizgavanje velikih količina vode, pijeska i kemikalija pod visokim tlakom u stjenovite formacije škriljevca kako bi se istisnula nafta i prirodni plin.