That's why we see the trend and the decline over the last decade of emissions from natural gas operations while we are at the same time increasing our production. (energytomorrow.org)
The cause, scientists say, is injecting wastewater from oil and gas operations into deep underground wells. (scientificamerican.com)
There is increasing evidence that these earthquakes are caused by injecting fluids from oil and gas operations deep into the earth. (sciencedaily.com)