Agence France-Presse: With political efforts to tackle global warming advancing slower than a Greenland glacier, schemes for saving Earth’s climate system that once were dismissed as crazy or dangerous are gaining in status. . Negotiating a multilateral treaty on curbing greenhouse gases is being so outstripped by the scale of the problem that those promoting a deus ex-machina — a technical fix that would at least gain time — are getting a serious hearing. . To the outsider, these ideas to …