Unfortunately, every time a plan for carbon sequestration is proposed, the Green movement attacks it. Now we find that even trees aren't useful since they do absorb CO2 but the methane they emit more than makes up for that. Pumping it underground, into tanks, into the ocean, none of those will work they say. Maybe they'll only be happy when no one has a car, no one has electricity and we're living a less technological lifestyle than they had in the 1700s. Or maybe they'll still have cars and lights, just not us unwashed masses who don't care enough for the planet. They're even unhappy about the OneCAT which runs on compressed air, since you still need power to make the compressed air. Which is odd since you can make that with electricity from renewable sources the last time I checked. If planting trees is bad for the environment then get out your chainsaw. Since air pollution has slowed warming, pollute more. Don't cry for the rainforests since their loss has also slowed warming. Basically it's the old saw, everything you know is wrong.