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Leadership in both the U.S. House of Representatives and Senate are calling on the Department of Energy (DOE) to allocate US $250 million of the $2.5 billion in stimulus funding for renewable energy research and development to the emerging marine renewable energy industry. The funding would help develop wave, current and tidal energy technologies

A vote could come as early as this week in the U.S. Senate on a bill introduced by Senate Tax Committee Chairman Max Baucus (D-MT) and Senate Majority Leader Harry Reid (D-NV) containing a one-year renewable energy production tax credit (PTC) extension and a small wind turbine investment tax credit. The Senate bill, S. 3335, contains a one-year PTC extension at its current value. After December 31, 2009, any further extension would include the "presumption" of a cost cap, which would, through a complex formula, put a ceiling on the value of the credits of no greater than 35% of project value. The small wind ITC has a cap of US $4,000 per system.The 10-year cost for the PTC, including all technologies to which it applies, is projected to be approximately US $7 billion, while the ITC, which includes solar, would cost approximately US $907 million over 10 years. The bill also includes provisions to extend through 2014 the tax credits for solar energy, fuel cell and microturbine property, as well as the residential energy efficient property tax credit. Marine renewable energies could also benefit from the bill as credits to build wave, tidal, current and ocean thermal energy conversion systems of at least 150 kilowatts (kW) are extended through the end of 2011.

Ireland's OpenHydro and Germany's RWE are spending millions to try to turn the power of waves into electricity With oil prices hitting almost daily record highs and global warming climbing up the public agenda, the need for alternative energy sources has never been more urgent. But while wind and solar have dominated the recent rush to invest in renewables, market watchers reckon it could now be marine energy's turn to shine. Ocean power-using the energy from waves or tidal flows to produce electricity-is quickly coming of age as a viable green resource that could help meet ambitious global targets to reduce greenhouse gases and dependency on fossil fuels. European and North American power companies such as Canada's Emera (EMA.TO) and Germany's RWE (RWEG.DE) are spending millions to fund wind and tidal projects. This investment has led to a new generation of more efficient technologies, with dozens of prototypes expected to be ready for commercial deployment within the next five years. "There's huge interest in both wave and tidal technology," says Thomas Boeckmann, clean tech analyst at market research firm StrategyEye in London. "It's gaining a lot of attention from energy companies, which will be able to offer financial backing and technical expertise to these startups."

Picture a kelp bed on the ocean floor swaying in the current. Done? Now picture an underwater field of bioWave turbines (pictured to your left) doing the same

the most detailed popular discussion of geo-engineering I have come across so far. In broad terms three possible techniques were identified:\n\n* Removing carbon dioxide from the oceans.\n* Removing carbon dioxide from the atmosphere.\n* Using lenses or mirrors to divert sunlight from the planet.\n\nHowever, the discussion is still wracked with anxiety. On the one hand, some are arguing that things are getting so bad that geo-engineering might be necessary despite the possibility of damaging unintended consequences. On the other hand, others are worried that discussing geo-engineering could shift the discussion away from decarbonisation. An added worry seems to be that developing countries such as China and India - those that most need great increases in energy supply - could take a lead in developing the technology.\n