> Additional heat we put into the atmosphere will not stay for long enough to matter I'm just not too sure about that; Fossil fuels took millions of years, and

> Additional heat we put into the atmosphere will not stay for long enough to matter I'm just not too sure about that; Fossil fuels took millions of years, and massive natural forces, to accumulate in their modern day form, very similar to uranium and other energy resources. That's a lot of energy that went into "making" them over a lot of time. But humanity is "unloading" all that energy, with all its effects including thermal radiation, into the atmosphere at extremely faster rates than it took to accumulate. And we've been doing it at a literally global and industrialized scales. We even recognize the problem of thermal pollution on a "micro" level when we throttle and shut down generators, reactors and industrial processes that threaten to overheat the natural water bodies they use for cooling. I see no reason why these issues can't accumulate and scale up to global levels. Disregarding that possibility, as if humans couldn't screw up the planet on such scales, are exactly what made us run head first into global warming trough CO2 emissions and littering most of the planet with led and plastics.