Humanity’s methane problem could be much bigger than scientists thought
LA TimesFossil-fuel production may be responsible for much more atmospheric methane than scientists previously thought, according to new research published today in the journal Nature. Scientists aren’t challenging the top-line amount of fossil methane that enters the atmosphere every year — that number stays at about 194 million metric tons, says Benjamin Hmiel, a postdoctoral fellow in Earth science at the University of Rochester and the study’s lead author. The new paper’s estimate is dramatically smaller: Just 5 million tons, at most, come from natural sources, or “seeps,” the study says. “If it’s not coming from seeps, then it’s coming from fossil-fuel operations,” says Rob Jackson, a Stanford professor of Earth system science who wasn’t involved in the study. “That will also get at the question, how big are the oil and gas industry methane emissions internationally?” The Nature paper builds on earlier work suggesting that natural methane emissions may be dramatically lower than previously indicated, and has triggered self-examination among some of the same scientists who’d produced the earlier, lower estimates.