Could gas from grass rival fracking to heat UK homes?

The grass is always greener than the shale gas on the other side, according to a British businessman who claims grasslands could provide enough gas to heat all of the UK’s homes.
Dale Vince, the chairman of renewable energy company Ecotricity, is investing £10m in the first of a generation of what he calls ‘green gas mills’ that he says could compete against gas from fracking.
The company said its Hampshire plant at Sparsholt College, which has planning permission and is slated to be operational in 2018, will take grass harvested from nearby fields and break it down in an anaerobic digester.
Grass at the plant would be turned into biomethane within 45 days and then injected into the national network, providing the heating needs of more than 4,000 homes.