Time to rank the best ideas to engineer the climate?
IT’S time to stop churning out ideas for repairing Earth’s climate and start working out which show the most promise so they can be tested. So says a researcher who is calling for an international organisation to rank all ideas to geoengineer the climate. Various proposals have been put forward, from putting “sunshades” in space to burying carbon dioxide. “The ideas for how to change our climate keep getting pumped out. They get lots of column inches,” says Philip Boyd of the National Institute of Water and Atmospheric Research in Dunedin, New Zealand. “My concern is that we will reach a tipping point,