Oceans, which cover more than two-thirds of the planet, hold a large amount of energy. In fact, the U.S. Department of Energy estimates ocean wave and tidal currents have the potential to account for 15 percent of the nation’s electricity by 2030.
While technologies harnessing energy from tides and currents have been domestically discussed for decades, the nation’s first commercial tidal energy project was dedicated in Maine Tuesday. This first tidal generator is expected to begin delivering electricity to the regional power grid in September—with just enough juice to power 25 homes as it starts out. The U.S. Navy, too, is exploring harnessing wave power as part of a larger plan to reduce energy consumption by 50 percent by 2020.
Meanwhile, the U.S. Department of Interior identified 17 sites on public land across six Southwestern states that could be ideal for the development of solar energy. The plan, which will be finalized after a 30-day comment period, places 445 square miles of public land in play for utility-scale solar facilities. On the technology front, researchers at the University of California, Los Angeles are taking the idea of solar power from roofs to windows with the invention of a thin, transparent solar cell that can turn the sun’s energy into electricity while still allowing visible light to stream through. The cells, researchers claim, can be produced at high volume for low cost and installed at an estimated $10 to $15 per window.
Effects of Drought, Heat Continue To Be Felt
NASA satellites tracking ice surface melt in Greenland recorded unprecedented melting over the course of four days in July—melting even occurred at Greenland’s coldest, highest place, Summit Station. While the ice sheet normally sees melting over summer months, the speed and scale of the thaw—which went from 40 to 97 percent—surprised scientists. “Ice cores from Summit show that melting events of this type occur about once every 150 years on average,” said Lora Koenig, a glaciologist who belongs to the research team analyzing the satellite data. “With the last one happening in 1889, this event is right on time. But if we continue to observe melting events like this in upcoming years, it will be worrisome.”
The drought in the United States continues to spread, forcing some plains ranchers to sell cattle and driving down the U.S. corn yield to a 10-year low. It has some contemplating whether we are headed for a repeat of the 2008 global food crisis, but others are more optimistic, saying farmers may weather the drought better than in 1988. With National Weather Service forecasts indicating the drought is likely to worsen, The Washington Post took a comprehensive look at whether climate change is causing the drought. The short answer: Droughts have multiple causes, there have been worse ones in the past, and most evidence suggests droughts will become more intense in many parts of the world if the planet keeps heating up, which could disrupt the world’s food supply.
Rules Get Review
The U.S. Environmental Protection Agency (EPA) is reviewing part of a controversial rule that sets the first federal standards to reduce mercury and other toxic pollutants from power plants. The review was prompted by power plant operators who found the rule was confusing for new plants.
The EPA also has issued new—and largely unnoticed—rules limiting sulfur dioxide and soot emissions from cruise ships. The new rules, which go into effect Aug. 1, would require cruise ships to immediately reduce the sulfur content of their fuel from an average of 2.7 percent to 1 percent, and to reduce that number to 0.1 percent by 2015. EPA estimates the benefits of the new rule, by 2015, will be like removing 12.7 million and 900,000 cars off the road per day in terms of sulfur dioxide and soot emissions. The cruise ship industry and some Alaskan officials worry about the increased cost and availability of the lower-sulfur fuel, however, and Alaska’s attorney general has filed a lawsuit to block the new rules.
The European Commission announced a rescue plan that would withhold carbon allowances to support its Emissions Trading Scheme, which has struggled of late due to an oversupply of carbon credits. The rescue plan would involve “backloading,” or delaying auctions of carbon allowances, in an effort to bolster the program. While there are no firm numbers in the draft proposal itself, a Commission analysis assesses the possibility of withdrawing 400 million, 900 million or 1.2 billion allowances over the first three years of the market’s next phase.
Cars that Drive Themselves
Motor vehicles are responsible for a significant percentage of U.S. carbon emissions. As YaleE360 tells it, self driving cars—which could greatly reduce the risk of accidents and slash fuel consumption and emissions—may be a reality sooner than you think.
The Climate Post offers a rundown of the week in climate and energy news. It is produced each Thursday by Duke University’s Nicholas Institute for Environmental Policy Solutions.