03/18/2010 05:12 am ET Updated May 25, 2011

DIY Ecology: 4 Ways To Engineer A New Earth

The planet has a fever and how we cool it down is the challenge of the century. How do we start? According to advocates of a branch of scientific techniques known as geo-engineering, the only approach is to think big and change the planet's ecosystem before it changes us. Are we ready for these four scientific experiments on a truly global scale?

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