Gas not as clean as we think

Extracting natural gas from shale could do more to aggravate global warming than mining coal, according to a Cornell study published in the May issue of the peer-reviewed journal Climatic Change Letters. While natural gas has been touted as a clean-burning fuel that produces less carbon dioxide than coal, ecologist Robert Howarth warns that we should be more concerned about methane leaking into the atmosphere during hydraulic fracturing.

Read more at Cornell University