Washington Independent: The scientific consensus on geoengineering — a manipulation of the environment to counteract climate change — has come a long way in the past few years. As recently as 2006, it was unthinkable to many climate scientists that leaders in their field would seriously consider the idea of shooting reflective particles into the atmosphere or dumping massive quantities of iron into the oceans. “When I first started looking into this in 2006, it was like talking to an insurance salesman …