Još jedan problem je zagađivanje tla i vode u tom procesu -- hidraulično lomljenje ili takozvani "fracking" -- u kom se radi o upumpavanju velikih količina vode, pijeska i hemikalija u škriljčane kamene formacije pod visokim pritiskom, kako bi se istisnuli nafta i prirodni gas.
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.