Algae fuel firms face moment of truth
Something green is growing in the state of Texas.More famous for its oil prospectors than green entrepreneurs, it is home to a surprisingly large conurbation of algae start-ups.
They are part of the latest generation of firms trying to solve the problems that have prevented algae making any meaningful contribution to the world's energy needs.
Algae fuel is based on technologies which seek to use algae or bacteria to produce fuels by combining light, carbon dioxide, water and nutrients through photosynthesis.
It is a dream which has arisen every time the oil price has spiked.
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