?url_ver=Z39.88-2004&rft_id=0.1007%2Fs10584-011-0061-5&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Howarth%2C+R.W.&rft.aulast=Howarth&rft.aufirst=R.W.&rft.volume=106&rft.date=March+2011&rft.issn=1573-1480&rft.atitle=Methane+and+the+greenhouse-gas+footprint+of+natural+gas+from+shale+formations&rft.title=Climatic+Change&rft.pages=679-690&rft.genre=article