1. Can I safely say I'm not contributing to Global Warming and that no CO2/CO is coming out my exhaust?

2. I need to get my 85 300TD inspected/registered before I break it down for half year engine overhaul. It doesnt make sense to put a new exhaust on it yet--thats done after you put the exhaust back on. Will my hole in muffler pass inspection--I dont think it would be picked up by exhaust analyzer.

3. What gases come out exactly?