Can algae save the world again? The microscopic green plants cleaned up the earth's atmosphere millions of years ago and scientists hope they can do it now by helping remove greenhouse gases and create new oil reserves.
In the distant past, algae helped turn the earth's then inhospitable atmosphere into one that could support modern life through photosynthesis, which plants use to turn carbon dioxide and sunlight into sugars and oxygen.
Some of the algae sank to sea or lake beds and slowly became oil. "All we're doing is turning the clock back," says Steve Skill, a biochemist at the Plymouth Marine Laboratory.
"Nature has done this many millions of years ago in producing the crude oil we're burning today. So as far as nature is concerned this is nothing new," he said.
The race is now on to find economic ways to turn algae, one of the planet's oldest life forms, into vegetable oil that can be made into biodiesel, jet fuel, other fuels and plastic products.
"So we are harvesting sunshine directly using algae, then we are extracting that stored energy in the form of oil from the alga and then using that to make fuels and other non-petroleum based products," Skill said.
He predicted that industry will be cultivating algae in viable quantities for commercial oil production with a decade.
Such fuels are considered to be net carbon neutral because the algae absorb greenhouse gases when they grow.
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