New research has linked the United States to the massive rise in global methane emissions.

Bobby Magill reported on the Harvard University study at Climate Central on Tuesday.

Using satellite data, the researchers found that methane emissions in the country rose over 30% over the 2002–2014 period, and that increase “could account for 30–60% of the global growth of atmospheric methane seen in the past decade,” the study’s abstract states.

Though the study does not attribute the increase in the U.S. to a particular source, Magill notes that the rise coincided with the fracking boom.

“I’d say the biggest takeaway is that there is more we—the U.S.—could be doing to reduce our methane emissions to combat climate change,” study lead author Alex Turner told Climate Central.