The company also develops Refuse Derived Fuel (RDF) from the remaining waste but said "there is little opportunity to sell this material in the UK" .

BBC: Tayside and Central Scotland

In the quest to tap new sources of renewable energy, scientists are turning to the sun, to the wind, and of course, to a variety of bio-derived fuel alternatives.

FORBES: Getting Power From Salty Water

Flight AC991 from Toronto to Mexico City is expected to generate at least 40 per cent fewer emissions by using jet fuel derived from recycled cooking oil and through other fuel-saving measures, making it the most environmentally-friendly flight ever flown by Air Canada.

ENGADGET: Air Canada embarks on its first biofuel-powered flight from Toronto to Mexico City