Climate Letter #420

Posted on June 11, 2015 by Carl Campbell

A new study about future prospects for plant growth as climate warming continues.  Doubts are raised about the potential benefits of having extra CO2 in the air and a longer growing season.  Other factors are involved which could lead instead to overall declines in plant production, putting pressure on future food supplies.              http://phys.org/news/2015-06-ongoing-climate.html

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An update from Georgetown, Texas.  This city of 60,000 will soon be getting 100% of its electricity from wind and solar sources.  Here you can get the full story of how all of the relevant decisions were made, and the expected benefits.  One of the main points is that, even in Texas, hardly anyone “prefers” oil or gas (or coal) as a source of energy if something else makes more sense economically, which was clearly the case for Georgetown.  I think that rule would apply universally.

Finland can have a fully renewable energy system.  That means for all energy requirements, not just electricity.  This is the conclusion of a study not unlike the one reported here yesterday that came from Stanford University relevant to the U.S.  The Finns seem to have the right mentality for achieving such an ambitious goal.                     http://cleantechnica.com/2015/06/10/fully-renewable-energy-system-economical-viable-finland/?

An update on black silicon solar cells.  An impressive new efficiency record has been set, along with indications that further improvement is possible.                                 http://cleantechnica.com/2015/06/10/black-silicon-solar-cells-new-conversion-efficiency-record-22-1/?

Review and analysis of China’s impact on the demand for oil.  As with coal consumption, oil consumption in China has risen spectacularly over the last thirty years—from 2 million barrels per day to 11 million.  There are prospects for a major  reversal of coal, mainly because of its ugly type of pollution, but what about oil, plus gas as well??  These are both much less dirty than coal but also emit plenty of CO2  We still don’t know how much China cares about the CO2 factor, and that could be a problem.                                                     http://oilprice.com/Energy/Crude-Oil/Oil-Markets-Could-Be-In-For-A-Shock-From-China-Soon.html

Carl

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