In his column today, which argues for responsible fracking, telling readers that there can be enormous gains from using cleaner techniques in fracking. In discussing the importance of reducing fracking related methane emissions Nocera comments:
"How big a difference will it make to the environment if industry can minimize methane leaks? A lot. ... Suppose, for instance, the current leak rate turns out to be 4 percent. Suppose we then reduce it in half. That would mean an immediate reduction in overall U.S. greenhouse gases by — are you sitting down for this? — 9 percent. If the leaks are reduced to 1 percent, the decrease in greenhouse gases jumps to 14 percent."
While Nocera does not make this point, but if cutting the methane emissions from fracking in half would reduce greenhouse gas emissions by 9 percent, then the methane emissions must come to close to 18 percent of total greenhouse gas emissions. If methane emissions are actually 6 percent, as indicated by a study Nocera cites, then fracking would account for more than one quarter of all U.S. greenhouse gas emissions.
Nocera may have his numbers completely wrong, but the implication of the evidence presented in his piece is that fracking is an incredibly dirty process from the standpoint of greenhouse gas emissions. If his numbers are right, he makes a compelling case for banning fracking unless it can be done far more cleanly than is currently the case.