Maybe CO2 emissions haven't been regulated successfully because attempts to regulate the came far too late, and the attempts to regulate similar issues in space are coming right on time?
It's a lot harder to stop a very, very large group of people from doing something that they've been doing for generations. It's much easier to stop a much smaller group of people from starting something new.
How would starting earlier have stopped industries from outsourcing CO2 emissions to other/exempt countries? If you look at graphs of global emissions it's like they didn't skip a beat once legislation and treaties in the west kicked in.