Plant 2 trees instead of 1 to offset carbon emission: Prof. Munasinghe

http://www.sundaytimes.lk/101010/BusinessTimes/bt29.html

He also suggested that, while there was a 50% chance of climate change being caused by emissions rather than it being a natural phenomenon, similar odds of 50% offered to anyone embarking on an airplane journey, which would allude to them possibly not arriving safely at their destination, would result in nobody wanting to fly.