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Global Warming: Beyond the Tipping Point: Scientific American
The most recent major report from the Intergovernmental Panel on Climate Change in 2007 projects a temperature rise of three degrees Celsius, plus or minus 1.5 degrees—enough to trigger serious impacts on human life from rising sea level, widespread drought, changes in weather patterns, and the like.
But according to Hansen and his nine co-authors, who have submitted their paper to Open Atmospheric Science Journal, the correct figure is closer to six degrees C. “That’s the equilibrium level,” he says. “We won’t get there for a while. But that’s where we’re aiming.” And although the full impact of this temperature increase will not be felt until the end of this century or even later, Hansen says, the point at which major climate disruption is inevitable is already upon us. “If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted,” the paper states, “CO2 will need to be reduced from its current 385 ppm [parts per million] to at most 350 ppm.” The situation, he says, “is much more sensitive than we had implicitly been assuming.”
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The Tide Is Turning: Turbine Rides Underwater Currents Like a Kite: Scientific American
There is no market yet for turbines that turn the tides into a source of energy from deep beneath the sea. But that has not stopped mechanical engineers at the University of Strathclyde’s Energy Systems Research Unit (ESRU) in Scotland from developing one that will ride the tide while latched to the seabed by a cable—like a kite flying on a windy day.
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Eco-Cities: Urban Planning for the Future: Scientific American
Today it is an almost completely paved naval air base built atop earthen material dredged from the San Francisco Bay in the 1930s. By 2020 it is scheduled to become one of the most sustainable communities in the U.S. According to a master plan from the engineering firm Arup, the 400-acre island would be home to 6,000 new apartments and condominiums surrounded by large buildings along the San Francisco coastline. The homes—and the adjacent businesses they supported—would get 50 percent of their power from renewable resources, including solar electricity and solar water heaters.
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Saudi Arabia’s Crude Oil Reserves Propaganda
Saudi Aramco is no longer the world’s leading crude oil producer. Saudi Aramco’s statement of 260 billion barrels of remaining recoverable reserves is almost certainly false. Instead, the remaining recoverable crude oil reserves are probably less than 100 Gb, instead of 260 Gb.
