I did hear a scary statistic. When USA's aviation fleet was grounded on Sept 11th there was a perceptable 2% drop in CO2 emissions.
Interesting how the number "2" keeps popping up. I believe that 2% of CO2 is related to aircraft, how this 2% can suddenly dissapear overnight reinforces either how confused people can be, how many lies are promulgated or how unreliable the data is in the first place.
However, the Global Dimmers claimed that Calafornia for 2deg warmer because there weren't any contrails...go figure.