Geoengineering pops up left and right increasingly often. Also called climate engineering, it involves large-scale interventions aimed at reducing global warming. So far, it has been limited to computer modeling and laboratory tests, but the range of options is growing by the day. A quick search of the World Wide Web shows that there are geoengineering ideas galore. For instance, solar radiation management would deflect sunlight away from the earth by increasing the reflectivity of the atmosphere or the earth’s surface. Whitening of both clouds and roofs is considered. Under this heading, even space sunshades are envisaged. The last such idea I came across involves starting new volcanoes to shield the earth from the sun. Similarly, carbon dioxide removal would capture greenhouse gases from the atmosphere and remove them by mixing them with soil, for instance. Projects involving massive tree planting and ocean fertilization with iron also fall under the removal heading. The wildest idea of this kind is to eject the captured gases into space with rockets. But the main problem with geoengineering is that it rarely deals with the political side of the implementation process. Given that they would affect everyone on earth, large-scale projects of this ilk would need an approval of all nations. Besides, the requisite funding would need to come from all nations, as well. How would such a gigantic project ever be agreed upon? The geoengineering enthusiasts do not bother themselves with such questions, though. Sitting by their computers or in their labs, they are concerned only with ideas. Big ideas, as it were.