The real focus needs to be on political action to stop this runaway train, real soon.

Since Serengeti-scale savanna scenes are only one or two million years old, our earliest after-the-apes ancestors didn't move into this scene so much as they evolved with it, as the slower climate changes and uplift produced more grass and less forest.

Stopping emissions growth represents the most minimal of do-something responses.

Anyone who would tackle our current addiction to fossil fuels is going to have to maneuver around denial.

Perhaps we should put up posters in such places reminding people that where they stand was underwater the last time that the Earth ran a 3°F fever.

The real focus needs to be on political action to stop this runaway train, real soon.

Carbon-free energy is simply something we have to do. The time for talk is past. If we turn around net carbon emissions by 2020 rather than 2040, we get another 2° of fever rather than 3° - and that's a big difference.