Global warming?

[Urbane Guerrilla]

Originally Posted by ZenGum

. . . taking a large amount of energy that had been locked up as chemical (or nuclear) energy, and releasing it to turn into heat. That warms the atmosphere. While a warmer atmosphere will emit more heat to space (ceteris paribus), it is less than 100% pass through and so this alone would/should/will/already-has cause(d) warming.

Waste heat, and thermodynamics.

But there have definitely been enough problems predicting the climate as to suggest the models aren't right yet.