The 15 different options are grouped into 4 categories:
1. Efficiency
2. Decarbonization of power
3. Decarbonization of fuel
4. Forests and agricultural soils

I'd like each member of your blog group to take responsibility for researching one of these categories. That way, when we get together on Tuesday you will be able to have a detailed, informed discussion of our different choices.

I'll take on the first one