Geoengineering, as a way of halting or delaying climate change, is a kind of mad science. One method involves putting sulfur particles into the air to reflect more sunlight, slowing the heating of Earth in much the same way that a gigantic volcanic eruption once cooled the world. Thing is, sulfur particles in the atmosphere also cause acid rain. Directly altering the climate to counteract another human-caused climate alteration is at the very least hubristic. Studying the implications of such geoengineering attempts is the first step toward actually attempting geoengineering, but it is also an important move if geoengineering is to be done responsibly. And it's a far better move than watching rogue individuals attempt scientifically unsound geoeningeering efforts on their own.