From K. Jannaway
Efforts to combat the greenhouse effect have focused on countering the
build-up of carbon dioxide in the atmosphere
(23 October, p 20). Why is so
little attention given to the effect of methane on global warming? It is a more
powerful greenhouse gas than CO2. One of its chief sources is the guts
of ruminants.
Beef is beginning to go out of favour, and if the land now given to cattle
rearing were given to trees, both CO2 and methane levels in the
atmosphere would be lowered.
Leatherhead, Surrey
