renewable energy
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Duckweed Raises Hopes for Biofuel

Feb 22, 2014
Scientists believe they have identified a vigorous new source of biofuel -- a tiny plant that lives almost everywhere and grows with extraordinary speed.Scientists believe they have identified a vigorous new source of biofuel—a tiny plant that lives almost everywhere and grows with extraordinary speed.

U.S. Team Makes Oil From Algae — Fast

Dec 23, 2013
Although it's still a long way from commercial viability, a U.S. team has produced oil from algae in less than an hour, in contrast with the millions of years the natural process needs.

Renewables ‘Need Huge Mineral Supply’

Oct 31, 2013
The world will have to hugely increase its consumption of minerals, and to find sustainable ways of exploiting them, if it is to replace fossil fuel technologies with renewables, researchers say.