Sea levels are rising. Ice is melting. Floods, droughts, and heat waves are now more intense and frequent. Although some countries have increased their use of renewable energy, global emissions continue to escalate.Carbon sequestration is the most important engineering challenge because it addresses one of the greatest dangers we face today – global warming.
Carbon-sequestering containers from Arizona State University’s Lackner, Climeworks’ carbon-trapping facility in Switzerland, and other projects are all examples of technology that use the direct air capture and storage method. This uses chemicals or solids to capture the gas from air, then stores it underground or in long-lasting materials. Direct air capture can supposedly sequester carbon a thousand times more efficiently than plants, and it can be used anywhere around the world.
http://www.engineeringchallenges.org/challenges/sequestration.aspx
