In low Earth orbit (where most satellites can be found) gravity is almost as strong as it is on the surface. Below the Adams Line, all of the CO2 pumped out of the pipe will fall back to Earth. Above the Adams line the released CO2 will find itself in orbit, and we’ll have given Earth a ring system. But if we want to get rid of Earth’s CO2 forever, and not just orbitally sequester it, we need it to escape from Earth’s gravity entirely. Given that, suddenly and irreversibly chucking a third of Earth’s CO2 into space has a fair chance of being a really bad idea.