If we don't start thinking big about the CO2 problem, we may miss our opportunity to stop a climate runaway that will trash the habitable parts of the earth.

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.

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

Countries that innovate first get the new jobs, developing an economic edge over the C-free laggards that end up having to later import the technology.

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

Even if we stop the growth, we'd still be adding a constant amount of fossil carbon to the atmosphere each year.