The European aviation industry emits 344,109 tons of CO2 per day.
Eyjafjallajokull emits about 15,000 tons of CO2 a day. The 60% flight ban in Eurpoe has thus saved 206,465 tons every day. Which, from a battling global warming perspective, is an amazing amount to be thankful for. From: http://www.guardian.co.uk/news/blog/2010/apr/19/iceland-volcano-ash-planes-europe
