<i>Moose with wind are worse than gas guzzlers</i>

But only if you drive your gas guzzler less than 13,000 km a year.

Anyone who thinks that 120,000 moose have a bigger impact on the environment than the 2,000,000 cars on the roads of Norway is grasping at some very tiny straws.

Jinchi, Austin Texas, USA

So when millions of North American bison were killed in the 19th century did this put back global warming?

An alternative view is that the earth has been getting along quite nicely with millions of ruminants for millennia, and the presumption that the recent global warming, which we’ve experienced, is caused by methane or carbon dioxide is just so much bull.

Neil, Norwich,

This story just shows what a fraud the kyoto treaty is. Methane is a minor contributor to the greenhouse effect, it quickly breaks down, and methane levels are not currently increasing. Carbon dioxide is the main contributor to the greenhouse effect, it potentially has an atmospheric lifetime of thousands of years, and carbon dioxide levels are increasing exponentially. Which one do you think we should be worrying about?

Hugh, London,

Shooting moose might be a way to encourage the likes of Dick Cheney to join the green lobby.

Ian Kemmish, Biggleswade, UK

Has anyone carried out a study on what one human expels? Even better what one human expels depending on diet?
Then we could tax the beerbelly belchers.

Christine in Hayes, Hayes, Middlesex, England

?!? burning fossil fuels is an open carbon cycle (pump it out, burn it up, add to the GHG), moose eating vegetable matter which arises partially from the removal of CO2 from the atmosphere is a closed (and natural) one...

S Brewster, Perth, Australia

Hold on a minute, lets get this straight, so a moose in one year can give off the methane equivalent of 2100kg of CO2 emissions, equivalent to car doing an 8000 mile journey, where as a plane can travel from Oslo to Santiago and back again, 16000 miles, and only leave a carbon footprint of 880kg of CO2, about 5 times less than a car per mile????? I wonder then if installing helipads on supermarkets and post boxes could help??

Robert Binsted, Southampton, England

"the biologist Reidar Andersen, a biologist", should know better than farthing nonsense. Whatever comes out of the moose was consumed by it, and taken out of the atmosphere by the plants it ate. What comes out of an airplane was stored in the earth hundreds of thousands of years ago, and therefore considered "new" pollution.

Ben JW Berg, Blue, Texas

Gee and I thought my husband had some serious gas... lol

Anna, Virginia, USA

Never have any respect for a man who feels the need to put "OBE" at he end of his email signature.

Terry Collmann, Teddington, England

It's the silly season all right! Well, all ruminants whether in Scandanavia or New Zealand put out copious amounts of CO2. However, perhaps here in the UK, instead of fussing about the imprecise folk science of whether or not CO2 is the real villain in "gobal warming", we should concentrate our efforts on improving the education and the manners of the young; support for those mentally unfit to take the rightful place in the community and the care of the infirm and elderly. Let;s do those things that are easily within our ability and let nature take its course - we really have no other option because nothing puny man does will have any true or lasting effect on the global environment! [don't foam and chew the carpet G. Monbiot - it ill-becomes you!]

John S. M. Roberts, O.B.E., Seaford, England