Climate Letter #1379

An editorial about climate action that everyone in America should read (The Hill). The author writes in a way that is short and to the point, accurate with respect to achievability, and realistic about the reasons for making a special effort.  The same line of reasoning should also be applicable to a solid majority of other nations.

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Energy efficiency does not get much publicity, but it has an important role in climate abatement and is becoming a higher priority among engineers. According to a national association, “Energy efficiency is a growing business…..2.25 million Americans work in Energy Efficiency, in whole or in part, in the design, installation, and manufacture of Energy Efficiency products and services.”  The payback is beneficial to both producers and users, which helps to make it politically feasible.
https://phys.org/news/2019-03-energy-efficiency-clue-politically-feasible.html?
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How climate change affects extreme weather around the world (Carbon Brief).  Based on more than 230 peer-reviewed studies that have been published, “Carbon Brief’s analysis suggests 68% of all extreme weather events studied to date were made more likely or more severe by human-caused climate change.”  They have all been mapped and detailed in a convenient way for anyone who wants to see the big picture.
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Over 5 million possible descriptions of future climate scenarios based on every conceivable combination of uncertainties have been modeled and evaluated.  Not may pathways led to a tolerable future, leaving a prominent result that the favorable resolution of two kinds of uncertainty stood out as absolutely essential if a tolerable outcome is to be accomplished.  One is that humans must act immediately to start making drastic cuts in emissions, which the one thing still fully under our control.  The other is no better than a hope, the hope that future climate sensitivity to growth in the atmospheric CO2 level will end up being on the low side of the fairly wide range of uncertainties that is now accepted as proper.  (That range is usually set at plus-1.5 t0 4.5C for a doubling of CO2, with fast feedbacks at equilibrium.)  According to the Abstract, “Even under optimistic assumptions about the climate sensitivity, pathways to a tolerable climate/economic future are rapidly narrowing.”
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Review of a new book about a previous period of climate change that presented many challenges and made a considerable difference for humans life:  “Nature’s Mutiny How the Little Ice Age of the Long Seventeenth Century Transformed the West and Shaped the Present,” by Philipp Blom.  Kirkus Review calls it “An absorbing and revealing portrait of profound natural disaster.”
Carl

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