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.

Why I must speak out about climate change

Unchecked carbon emissions are pushing Earth's climate toward catastrophic tipping points, with evidence already visible in melting ice sheets and extreme heatwaves. The planet now absorbs energy equal to hundreds of thousands of Hiroshima bombs each day, causing rising seas and mass extinction threats. Science makes clear that only rapid, systemic action can restore balance and avoid irreversible harm. A simple carbon fee and dividend plan offers a path forward, but delay makes the challenge ever more daunting.

Ignoring Climate Change Is Like Waiting For An Asteroid Strike

*Storms of My Grandchildren*

James Hansen's academic publications