At some point the energy we are capturing from the sun and core are going to start becoming a significant source of atmospheric heat (given that most wasted ene

At some point the energy we are capturing from the sun and core are going to start becoming a significant source of atmospheric heat (given that most wasted energy is dumped into the atmosphere as heat). I wonder when we'll need to start building heatsinks to send the energy back off into space (we could probably double-dip with thermocouples or sterling engines?).