Crowther Labs are planning to take action on climate change through tree-planting. They have worked out, as I have blogged before, the number of trees required to draw down climate naturally (although scientists have told us for years that trees will become less efficient at drawing down carbon in a warming world, so there is another feedback loop for you....)
I saw Tom Crowther speak about this at the ESRI UK User Conference, and he was excellent.
Here he is doing another speech, on the same theme at a different event.
This piece explores the links between SOIL and climate change.
Worth checking out their work...