When we send ships into space we realese tons of junk there and our atmosphere. When rubbish crowds around our atmosphere, heat gets trapped in which can trigger global warming.
To minimise the amount of junk in the atmosphere we could reduse the amount of debrea we realese with each of our spaceships. For example, if we put more fuel and a targeting system in thrusters we could bring them back to Earth and recycle them. We should not be spending billions just to kill our planet insteed we should focus on stopping global warming, this includes space junk.