Volcanoes - much heat, ash, rocks and molten magma but not much CO2, the atmospheric blanket keeping heat. see Do volcanoes emit more CO2 than humans?. Other than that, burning fossil fuels and land clearing exacerbate CO2 production creating a more dense blanket and causing a steady, beyond cyclic, temperature rise.
I live under a YSSY flight path where they line up along my side fence at 1500 feet outbound to exotic climes. They are active from 6am to 10.30pm. I am prepared to accept them as I use them and an overflight reminds me that tomorrow may well be another flying day. However there are many who bought homes well before the NS runways were built who cop it as well. Some of them may well have worked in glass factories all their lives and would like a little respite from the industrial grade noise that has followed them into old age.
6000 feet, I would call that an ambit claim. The greens don't have any airspace management expertise and it would be up to these people to work out sensible solutions to real problems. It may well be that some GA Lanes over Melbourne might be a good idea. Gspace over Sydney - forget it, doesn't exist til you get beyond Bankstown and AirService are talking about bring Espace down to 1200ft in that area. That will really bugger ultralights who don't have transponders.
Another plane just went over - useless bugger can't fly, missed my side fence by 50metres