Climate Letter #796

To achieve a 1.5C limit, what steps must be taken?  This story is based on the work of an organization called Climate Action Tracker.  I believe it is generally realistic, with well-grounded scientific accuracy.  As  pointed out, a few steps are relatively easy while others get progressively more challenging and at the very end, even with emissions out of the way, it all still depends on a successful negative emissions program that would bring CO2 in the atmosphere back down a long way from where we are now—by methods yet to be proven.

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Meanwhile, an up-to-date message from super-realist Kevin Anderson.  Here he is in a 47-minute video talking about what happened in Paris with analysis of the various behavior patterns of the political class, this before the Trump era came along.  He also lays out a “doable” pathway to meeting the limits, while leaving out the dream of negative emissions.  For obvious reasons, he is not a popular figure.  I have trouble finding any holes in his logic.
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Energy efficiency is emerging as a stronger force in demand reduction.  As observed by analysts at Citigroup, fundamental processes are accelerating, with Europe leading the way.  The economics are highly attractive and fossil fuel interests have difficulty erecting roadblocks for this type of activity.
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Global effects of the melting Arctic sea ice.  A comprehensive new report has been issued by the Stockholm Environmental Institute, warning of the prospect of uncontrollable catastrophic consequences for the world’s climate.  The story provides a link to the full report and a lengthy video of an associated seminar.  Recent temperature extremes in the region may have already triggered the change, something we should soon be finding out.
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A new study about the effects of ocean acidification on coral reefs.  It not only slows new growth but speeds up the erosion of existing framework, which is a new finding for this science.  This all happens aside from the effects of rising water temperatures, but the underlying cause is much the same.
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Life on the banks of Lake Chad.  It is quite grim for a number of reasons, one of which is that the lake itself is only one-twentieth the size of what it was fifty years ago.  This story features many fine photos.
Carl

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