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In the latest Electric Power Research Institute Journal, an article titled "Hydropower Reservoirs: A Question of Emissions" notes that reservoirs used for hydropower and for pumped-hydro energy storage are not necessarily as green as you might imagine. Or rather, they might be too green: carbon-rich organic material that accumulates on the reservoir floor can be the source of carbon emissions. A recent study of the 90-year-old Lake Wohlen, in Switzerland, for example, found high emissions of methane, as recently reported in the journal Environmental Science and Technology, in an article titled: "Extreme Methane Emissions from a Swiss Hydropower Reservoir: Contribution from Bubbling Sediments."

Material chemists at the University of Texas at Austin and the University of Minnesota say that according to their research, the efficiency of a solar cell may potentially be increased to more than 60 percent, up from what was thought to be a limit of about 30 percent. They report their findings in today’s edition of the journal Science.

Researchers at the Lappeenranta-Lahti University of Technology (LUT) in Finland and Energy Watch Group (EWG) have completed a 4½ year study that examined how to meet the goals of the Paris climate accords without such measures as carbon capture and geoengineering. Their conclusion? Run everything on electricity and generate all of that electricity using renewables, primarily solar.

Most governments provide some kind of financial assistance to boost energy supply or reduce prices for certain energy consumers. Fossil fuels have been widely subsidized for decades. The exact scale of these subsidies is not known because a comprehensive study has never been undertaken. What is clear is that fossil-fuel subsidies can drain government budgets and increase greenhouse gas emissions. In recognition of these unwanted impacts, the leaders of the Group of Twenty (G-20) countries agreed in September 2009 to phase-out inefficient fossil-fuel subsidies in the medium term. The Global Subsidies Initiative is well aware of the complex issues surrounding fossil-fuel subsidies and their reform. That is why last year, in anticipation of the current calls for such reform, it commenced an ambitious program to identify, measure, and analyze the effects of fossil-fuel subsidies. Key findings from the first five in-depth reports, which together make up the series Untold Billions: Fossil-fuel subsidies, their impacts and the path to reform, are summarized above. Below, each of the individual reports can be freely downloaded. Support for one of the papers, Gaining traction: the importance of transparency in accelerating the reform of fossil-fuel subsidies, was generously provided by the United Nations Environment Program (UNEP).

President Jimmy Carter signed a bill calling for 10,000 megawatts of OTEC capacity to be up and running by 1999. Then oil prices stabilized, administrations changed, and other than a few demonstration projects, nothing happened.

“When people actually have to build stuff that’s got to survive in the ocean and be insured, costs double. Insurance premiums triple,” he said. “And all of a sudden, what looked good when you announced it, you can’t actually get finance to build.”

Binger added that many small island nations still haven’t recovered from the debt they incurred during the oil crisis that began in 1979.