Using seaweed to eliminate methane from cow farts  

The CBC has an article on some interesting experiments on methane emission from ruminants - P.E.I. farmer assists in near-eradication of methane from cow farts.

A P.E.I. farmer has helped lead to a researcher's discovery of an unlikely weapon in the battle against global warming: a seaweed that nearly eliminates the destructive methane content of cow burps and farts.

"Ruminant animals are responsible for roughly 20 per cent of greenhouse gas emissions globally, so it's not a small number," said Kinley, an agricultural research scientist now working at the Commonwealth Scientific and Industrial Research Organisation in Queensland, Australia. "We're talking numbers equivalent to hundreds of millions of cars."