Name: Why I must speak out about climate change
Uploaded: 2012-03-07T16:08:59Z
Duration: 17 min 34 s
Description: Top climate scientist James Hansen tells the story of his involvement in the science of and debate over global climate change. In doing so he outlines the overwhelming evidence that change is happening and why that makes him deeply worried about the future.

Top climate scientist James Hansen tells the story of his involvement in the science of and debate over global climate change. In doing so he outlines the overwhelming evidence that change is happening and why that makes him deeply worried about the future.

James Hansen: Why I must speak out about climate change

Why I must speak out about climate change

Energy imbalance due to CO2 mirrors 400,000 Hiroshima bombs per day, signaling an urgent need to rethink our carbon footprint.

Past CO2 levels tied to 15m higher sea levels reveal our current trajectory could drown cities, calling for immediate climate action.

A carbon fee and dividend approach, rewarding lower emissions, could be our lifeline to a sustainable future and economic growth.