Officials want to use that pressure to flush fresh water out into the Gulf of Mexico to keep the oil offshore.

VOA: standard.2010.05.09

He says reports of water contamination occur wherever there is hydro fracking, perhaps because the process uses such great pressure.

VOA: standard.2010.01.02

Bigger livestock herds are putting greater pressure on land resources and disrupting some ecosystems and the animals generate significant amounts of water and air pollution, including methane, a climate-changing greenhouse gas.

VOA: standard.2010.02.22