You have JavaScript disabled
For the best experience, please turn JavaScript on.
Here's how
Skip to main content
Toggle Navigation
TED-Ed
Search
Register
or
Sign in
Discover
Lessons
Watch video-based lessons organized by subject and age
Collections
Find video-based lessons organized by theme
Explorations
Learn through interactive experiences created with other organizations
Blog
Read articles and updates from TED-Ed
Create
A Lesson
Build your own video-based lesson
A Collection
Organize video-based lessons in your own collection
Get Involved
Student Talks
Learn how students can create talks as part of a class, club or other program
Educator Talks
Learn how educators in your community can give their own TED-style talks
Nominate
Nominate educators to work with TED-Ed
Support
Donate
Donate to support TED-Ed’s non-profit mission
Shop
Buy products inspired by TED-Ed animations
Search
Discover
Lessons
Collections
Explorations
Blog
Create
A Lesson
A Collection
Get Involved
Student Talks
Educator Talks
Nominate
Support
Donate
Shop
Help
Contact
Blog
About
Educators
Patrons
Back to Earth School
How much do you know about removing carbon?
Take this five question quiz to test and build your knowledge.
Let's begin