Hacking the Earth without Voiding its Warranty

Geoengineering may be the only solution to our myriad environmental crises, but that doesn't mean the world should rush into it headlong.  Jamais Cascio, Senior Fellow at the Institute for Ethics and Emerging Technologies and the co-founder of Worldchanging talks to attendees at the State of Green Business Forum in San Francisco about how we can keep geoengineering's impacts positive.