Skip to main content

Why I must speak out about climate change - James Hansen

59,966 Views

2,492 Questions Answered

TED Talk

Let’s Begin…

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.

If we continue using fossil fuels as usual, what is the estimated percentage of species extinction worldwide by the end of the century (2100)?

About TED Talk Lessons

TED Talk Lessons are created by TED-Ed using phenomenal TED Talks. Do you have an idea for a lesson? Create it now using any video from YouTube »

Meet The Creators

  • Speaker James Hansen

More from Our Changing Climate