Of course we can thank 21st century Earth for teaching us how to affect an atmosphere and heat or cool a planet. Here at Gore Planetary Climate Adjustments we like to think we've enhanced and refined that knowledge, honed it to a fine art. Our machines, landed on the planet up to a decade before any people arrive, source local fuels and produce the precise range of emissions to create the perfect climate for your requirements.
The odd thing is that the people of 21st century Earth called these emissions pollution, considered them a bad thing. It's hard to imagine such a primitive way of looking at a world.