With carbon in the atmosphere now above 400 parts per million, reducing carbon emissions on the surface is no longer enough.
What's needed is a Drawdown, also the title of a book laying out and ranking 100 ways to achieve a reduction in atmospheric carbon.
Some you'd expect, like protecting tropical forests at number 5. But reducing food waste at number 3, and educating girls at number 5?
We have many questions for Katharine Wilkinson, the senior writer on the project.