Traditional solar cells only use up to 20% of the visible light they collect, and more efficient solar cells are too expensive for mass production.
August 12, 2008
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Traditional solar cells only use up to 20% of the visible light they collect, and more efficient solar cells are too expensive for mass production.
Most languages you haven’t even heard of. read more | digg story
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Anchor text — the linked text that is often included on web sites — is another of those keyword anomalies that you should understand. Anchor
Despite British government commitments to generate 20% of its electricity from renewable sources by 2020, proposals for wind turbine installations tend to run aground pretty
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