Operation Cloud lab
Watch on BBC Knowledge, channel 74
1/7/2015 at 9.30 p.m.
2/7/2015 at 4.55 a.m. and 11.25 a.m.
This documentary proves that methane from rumen animals and wet lands is vital for keeping the earth cool. It is filmed from the airship laboratory in eastern and Southern U.S.A.
A must watch programme