TED: Why I must speak out about climate change | James Hansen

The speaker shares their journey from a scientist studying Venus to a climate change advocate. They discuss the greenhouse effect, early research findings, and the challenges faced in raising awareness. The talk highlights Earth's energy imbalance, feedback loops, and the urgent need for policy changes. Proposed solutions include a carbon fee to reduce CO2 levels and prevent further warming, emphasizing the importance of action for future generations.

What evidence does the author provide regarding the current state of global warming?

How does the author relate the urgency of climate change to future generations?

What is the author's proposed solution to combat climate change?

What metaphor does the author use to describe the threat of climate change?