Not exactly a zero-sum game because the earth isn’t a closed system. We’re constantly getting heat energy from the sun and radiating it back out into space at

Not exactly a zero-sum game because the earth isn’t a closed system. We’re constantly getting heat energy from the sun and radiating it back out into space at an equal rate. The composition of the atmosphere (greenhouse gasses) decides what equilibrium temperature will be. So if we had big refrigerators refreezing the arctic (without creating greenhouse gasses), they would put a ton of heat into the air but it would radiate away into space just like any other heat captured by the sun, and wouldn’t really affect the earth’s average temperature.