Geoengineering, also called climate engineering, is a group of technologies that are seeking to mitigate the effects of climate change by two methods. The first of these, CDR, stands for carbon dioxide removal. The second is SRM, or solar radiation management.
CDR technologies are trying to remove the excess carbon stored in the atmosphere–greenhouse gases and emissions. When businesses and activists talk about the “carbon footprint,” they are talking about the total carbon emissions from a human activity. Positive carbon footprints mean the excess carbon we produce is hanging over our heads, stuck in the atmosphere.
What exactly is geoengineering? Engineers are working on technologies that will slow or reverse the consequences of climate change. These are two basic types: carbon dioxide removal, or CDR—this tech removes emissions and greenhouse gases. The second type is solar radiation management, or SRM. This tech reduces the amount of solar energy warming the planet.
Two concerns are at the top of a long list of concerns regarding efforts to reduce or reverse climate change. Do we understand the effects of a single change introduced into a complex system? Does complexity itself predict that we cannot know the consequences of a single change introduced into a system of great complexity, such as the atmosphere of the earth? Continue reading