A Taxonomy of Solutions
The very broad group of "technologies" that remove carbon dioxide from the atmophere range from biological systems like forests and wetlands to manmade machines (called Direct Air Capture). A high level view of the taxonomy of some of these opportunites looks like this:
Source: Lomax and Addison (2014), Greenhouse Gas Removal, Virgin Earth Challenge, request a copy at virginearth.com.
More details on all of these technologies and systems can be found in the many articles listed on our Resources page.