[garrettdreyfus]

>> In a closed system, you can't reverse something by using less energy than that which went into creating it.

>> Basic physics. From that principle there's only one possibly conclusion when it comes to climate change: We can't do a damn thing about it.

I agree that the climate crisis is grim and that geoengineering is not a cure all. I do not think your reasoning makes much sense. Say it takes 100x as much energy to capture C02 as to create it. If the energy it takes does not warm the atmosphere it is not a problem. For example, if solar energy was removed to C02 it would not contribute to the warming of the planet either by directly releasing heat or a greenhouse gas.

[robomartin]

That's a perfectly good "had wavy" argument. However, once you start attaching numbers to such a thing you will quickly discover reality is not as nice and clean as writing two lines of text.

There's nothing grim about climate change reality. We just have to accept it, clean up our act to the extent possible and adapt. The planet has survived billions of years. We are insignificant. We either pretend we can fix it (which is a mistake) or understand that the planet can make us disappear in an instant.

I mean, look at this pandemic. Had we not developed vaccines so quickly it would have been perfectly plausible for half the population of this plante to perish. Thinking we can control things at a planetary scale is pure ignorant hubris. We cannot. And we stand a far greater chance of killing everything on earth than to save the planet. The planet does not need saving.