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In last Thursday's vice-presidential debate, Joe Biden and Sarah Palin seemed to be falling over themselves to demonstrate their support of "clean coal." What is clean coal, anyway, and should I be in favor of it?

Clean coal: Never was there an oxymoron more insidious, or more dangerous to our public health. Invoked as often by the Democratic presidential candidates as by the Republicans and by liberals and conservatives alike, this slogan has blindsided any meaningful progress toward a sustainable energy policy.

Search giant Google on Tuesday pledged to spend hundreds of millions of dollars to make renewable energy cheaper than coal. The effort, dubbed RE), calls for Google to invest in companies developing clean-energy technologies and for Google itself to next year invest tens of millions in research and development in renewable energy.

The Top 10 alternative energy lobbying groups are largely biofuel, solar and wind trade groups, though the biggest contributor by far is the "American Coalition for Clean Coal Electricity,"

The 15,200 megawatts of new wind turbines installed worldwide last year will generate enough clean electricity annually to offset the carbon dioxide emissions of 23 average-sized U.S. coal-fired power plants, according to a new Vital Signs Update from the Worldwatch Institute.[1] The 43 million tons of carbon dioxide displaced in 2006 is equivalent to the emissions of 7,200 megawatts of coal-fired power plants, or nearly 8 million passenger cars.

Wind comes out the clear winner. Concentrated solar power, geothermal, solar photovoltaics, tidal, wave, are good additions to the mix. Hydroelectric is added for its load balancing ability. Nuclear and coal are less beneficial. Corn and cellulosic ethanol should not be included in policy options. Hopefully, the next administration will be wise enough to follow Pr. Jakobson's recommendation . . . and align its subsidies with the right kind of technologies.

"Facility Could Meet up to 75 Percent of Cape Cod and Islands' Electricity Demand CAMBRIDGE (April 28, 2010) - Leading environmental organizations hailed today's historic decision by Interior Department Secretary Ken Salazar to provide federal approval for Cape Wind, allowing the country's first utility-scale offshore wind farm to move forward. The announcement signaled the Administration's intentions to support renewable energy development off U.S. shores, a major component of a clean energy economy and reduced dependence on fossil fuels, the organizations said. Today's announcement ends a nearly nine-year environmental review process, much longer than is typical for a traditional coal power plant. The decision clears the way for Cape Wind to begin the permitting process and develop a 130 turbine wind farm in Nantucket Sound, which could meet as much as 75 percent of the electricity demand for Cape Cod and the Islands."

My Clean Break column today is actually more of a feature looking at compressed-air energy storage (CAES) and how Ontario, geologically, would be an excellent location to give it a try. About 50,000 natural gas and oil wells have been drilled in southwestern Ontario over the past 150 years and most of them are depleted. Turns out that depleted gas fields are one of several types of underground reservoir that can be used to store compressed air. Salt caverns are another option, and we have plenty of those as well. In fact, 60 per cent of Canada's natural gas storage is in the region. Compressing and storing air wouldn't be that different technically. Another benefit is that southwestern Ontario has strong wind resources, so building a 1,000 MW-plus CAES facility on its own or as part of a partnership with area wind developers could prove quite economical. The idea, of course, is that cheap wind power generated overnight when demand is down could be used to compress and store the air. The air could then be released to generate electricity during daytime peaks, making wind a dispatchable resource in Ontario and more of a realistic replacement for coal power as it gets phased out of the province. Surplus overnight nuclear power, when we have it (mostly during the summer), could also be stored this way.

Talking of "Strong measures" towards clean power...

Interesting, but a bit thin on specifics, and still a long way to market.