Greenhouse gas removal projects are a type of
climate engineering that seek to remove
greenhouse gases from the atmosphere, and thus they tackle the root cause of
global warming. These techniques either directly remove greenhouse gases, or alternatively seek to influence natural processes to remove greenhouse gases indirectly. The discipline overlaps with
carbon capture and storage and
carbon sequestration, and some projects listed may not be considered to be geoengineering by all commentators, instead being described as
mitigation.