The Amazon Rainforest is part of this global system and the sun is also the biggest factor in climates in environment and the sun is thousands of times bigger than the earth which means the sun impacts the earth thousands of times more than people do. Plus, we breath out and the trees breath in and we rely on each other and the CO2 thing is a good thing and not a bad thing.
RE: Switzerland is pulling carbon dioxide directly from the air - and using it to grow plants!