Carved into rock beneath the Swedish city of Västerås, a huge man-made cave system is being used to heat local housing
10
votes
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Seas of grass may be dark horse candidate to fuel the planet — or not
4 votes -
Why biofuels are terrible
5 votes -
Oil’s plunge is an existential threat to a far cleaner biofuel
9 votes -
From January, jet fuel suppliers in Norway must blend 0.5% of biofuel in all their aviation fuel – a policy Oslo hopes will lead to lower CO2 emissions
7 votes -
Could renewable natural gas be the next big thing in green energy?
2 votes