Article content There are ways that the Arctic could be cooled to slow permafrost thaw, which are more than theoretical, a virtual dialogue series heard Thursday. The bigger question, besides what such measures, such as solar geo-engineering, might cost is whether such dramatic human interventions should be entertained at all considering the risks that unforeseen consequences could raise problems that are worse. We apologize, but this video has failed to load. Try refreshing your browser, or Scientific interventions could shade Arctic permafrost, but should we? Back to video “There is essentially no technology barrier to doing this,” said Doug MacMartin, a senior aerospace engineering researcher at Cornell University about one technique that would involve injecting aerosol material into the stratosphere to reflect solar energy back into space.