Our CO2 mixes with everyone else's within a year, then hangs around for centuries like a shroud.

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

You can always spot the pioneers by the arrows in their backs.

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.

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

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.

Climate change has a very high procrastination penalty that just grows with each passing year of inaction - rather like what happens if you don't pay off your credit card. But for climate, there is no such thing as a fresh start from bankruptcy.