Direct air capture is a simple process that has been used on a small scale for more than 50 years: on submarines to keep the crew alive, or spacecraft to keep astronauts alive.
Now, the UN's Intergovernmental Panel on Climate Change saysastic action is needed to limit climate change, including sucking CO2 out of the air.
Direct air capture uses chemical reagents to remove CO2 from the air, and the Swiss company Climeworks has 14 small units removing 900 tons of CO2 a year from the air using chemical reagents.
"Removing CO2 on a large scale is a different proposition but is urgently needed," the Intergovernmental Panel on Climate Change says.
The company is building a plant in Iceland that is expected to remove 4,000 tons of CO2 each year and then pump it underground where it eventually turns. Read the Entire Article
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iTunes U has a variety of courses geared towards social entrepreneurship. With this app, it allows students to have customized learning experiences. Through learning that’s tailored to suit every student aspiring to be a social entrepreneur, SocialEarth.org checks off the top iTunes U courses and classes that are free to take. Some have videos, others have only audio. Take your pick: