Chris Huhne, department for energy and climate change minister, claimed more anaerobic digestion (AD) plants are also needed if renewable fuels are to account for 20 per cent of output by 2020, reports fwi.co.uk.
He told delegates at the Liberal Democrat party conference that biofuels would have a "very important" future, while also underlying the need to change the public perception of AD facilities.
Mr Huhne said: "We need to get anaerobic digestion plants out there and deal with the myths around them.
"We will work harder to make people love anaerobic digestion plants, particularly ones fed on pig slurry."
Financial incentives could also be introduced to make it "daft" for firms not to adopt renewable energy, he added.
Currently, the UK only produces more renewable fuels than two other European countries – Malta and Luxembourg.