Researchers are bringing science to bear on the question and consequences of humans using technology to put the brakes on global warming. Nine of the hottest years in human history have occurred in the past decade. Without a major shift in this climate trajectory, the future of life on Earth is in question, but is geoengineering a cooler Earth the way to go? “There is a dearth of knowledge about the effects of climate intervention on ecology,” says Phoebe Zarnetske, associate professor in the integrative biology department in Michigan State University’s College of Natural Science and lead author of the new paper in the