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With cement production accounting for as much as 5 percent of global emissions of carbon dioxide — and the potential for expanded carbon caps looming — Cemex, one of the world’s largest producers of building materials, is angling to bring down its carbon dioxide emissions and perhaps wind up with some credits it can sell.

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More electricity is already coming from solar and wind sources, so why not from switchgrass?

NRG Energy, a wholesale power generation company that operates in the United States, Australia and Germany, is experimenting with that possibility. The company announced on Wednesday that it has begun a pilot project to replace some coal with locally grown switchgrass and sorgham at its Big Cajun II plant in Louisiana.

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The US government on Tuesday announced that it will allocate an additional 550 million US dollars in grants to develop renewable energy projects. The goal is to double the US production of renewable energy from solar, wind, biomass and other renewable energy production facilities in a few years.

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As if we needed any more reasons to love beer, along comes this one: it’s a promising source of clean energy.

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Britain could save up to £12.6bn a year in imports of fossil fuels such as oil, gas and coal by 2020 if it embarks on a large- scale programme of energy efficiency and renewable technologies including wind power and biomass

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Are there really plenty of fish in the sea? University of British Columbia fisheries researcher Villy Christensen gives the first-ever estimate of total fish biomass in our oceans: Two billion tonnes.

And fish play a previously unrecognized but significant role in mitigating climate change by maintaining the delicate pH balance of the oceans, according to a study published in tomorrow's edition of the journal Science, co-authored by Christensen and a team of international scientists.

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