U.S. eyes wetland restoration as hedge against climate change

摘要

Americans have been draining wetlands for farming and development since Colonial times. But climate change may reverse that tide — from destruction to restoration. Federal scientists are studying whether heat-trapping carbon dioxide can be sucked out of the atmosphere and sequestered in restored salt marshes, sea grass beds and mangrove swamps. And those wetlands can in turn protect communities along the coast from rising seas and fierce, frequent climate-driven storms. “The concept that’s forming is that what we need to do is massive-scale ecosystem restoration as soon as possible to begin absorbing as much carbon dioxide as we can and diminish the amount of overshoot that we have in atmospheric greenhouse gases this century,” said Kevin Kroeger, a research chemist at the U.S. Geological Survey’s Woods Hole Coastal and Marine Science Center.