Phasing out nuclear power plants is causing difficulties for equally clean replacement (Axios). The plants are producing much of the world’s power but have a strictly limited lifetime, which cannot always be extended and only at a high cost. Wind and solar are not yet ready to make up the full difference, leaving new natural gas plants or extending inefficient old coal burners as the most likely options. The urgency of the nuclear situation creates an extra burden for emission control policies.
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A new study concludes that meeting the Paris climate targets is not possible without strong curtailment of economic growth (EurekAlert). “Researchers state that emissions reductions in line with 2C are only feasible if global GDP growth slows to less than 0.5%. Likewise, they indicate that reductions for 1.5C are only feasible in a degrowth scenario.” In other words, the whole idea of ‘green growth’ needs to be dismissed, which to all appearances is politically impossible.
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The commercial fishing industry provides a perfect example of how the concept of limits to growth applies to resources found in the natural world (Phys.org). “What we have seen over the last 65 years is more and more fishing vessels chasing fewer fish.” And with much lower productivity from the amount of expended effort.
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New research shows how ocean acidification adds to the dangers threatening coral reefs (Phys.org). The study investigated the effects of acidification on calcifying fluids that enable corals to survive. The underlying cause, excessive CO2 in the atmosphere, is of course the same as that which causes the higher water temperatures that also kills off corals.
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Aerosols in the atmosphere are known to have significant effects on climate, but accurately measuring those effects is frustrating for scientists (EOS). This story provides a good introduction to what the different aerosols are like, where they come from, and why everything is so complicated. Their regular properties can change because of the way they mix and interact when aloft.
Carl