I found this comment very interesting. It was in response to today's Guardian report that 240 scientists have produced a shocking official US Climate Assessment Report. I don't have time to try to check the veracity of the claims, but someone using 'Sustainable Energy Without the Hot Air' (freely accessed on line) might be able to do that. If so, please do add your calculations to this posting as a comment or link.

* 10,000 Gallons of Oxygen are burned for EVERY GALLON OF FUEL used in an engine...a plane or a car, etc.

* 3 Million Gallons of jet fuel are used every DAY at Chicago O'Hare. 
Multiply that by 10,000 Gallons of Oxygen Burned PER GALLON of fuel.

The result: 3 BILLION Gallons of OXYGEN are burned per DAY at O'Hare International Airport.

The net result: 3 Billion Gallons of Oxygen-Depleted Air are created loaded with at least 147 types of toxins and pollutants.

* One single large airliner uses more Oxygen per hour than all of the Earth's Six Billion people breathe during that entire hour.