Climate Letter #782

A big international issue we don’t hear much about.  This article is about adaptation finance, a means by which a number of wealthy countries made promises some years ago to provide funding to poorer ones to help them adapt to climate change.  There has been a lot of backsliding, and the gap has actually widened during the year since the Paris negotiations.  This will be a big issue at the Marrakech conference next week.

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The role of soil as a carbon sink is in danger.  A new study looks at the impact of land usage due to population growth and predicts future declines in soil carbon.  “The only way to maintain soil’s role as a carbon sink would be to convert more land into grass or forest. That’s unlikely to happen, scientists say. Every year, more land is cleared and plowed to house and feed the world’s growing population.”  This change by itself could independently add considerable amounts to the growth of CO2 levels in the atmosphere.
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The high rate of retirement of nuclear power plants is causing a problem.  Most of the time utilities end up burning either coal or natural gas as a replacement.  There is a whole generation of plants all over the world, including the US, that supply large amounts of electricity and are coming due for retirement.  Alternatives to fossil fuels are generally not yet ready at the required volume level, which eventually should change.
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A new type of transmission technology widens the reach of giant wind farms in the US.  The first new line will carry energy from Oklahoma. where the wind blows hard, to much quieter Tennessee.  The high voltage lines gain efficiency by carrying direct current, making them ultimately suitable for construction of a supergrid.
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A hydrogen-powered passenger train will soon be on the tracks in Germany.  It has many attractive looking features in addition to having zero emissions.  Currently there are 4000 commuter trains fueled with diesel in Germany alone.
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The competitive cost of rooftop solar plus battery storage in Australia.  These calculations were made for installations using the new Powerwall-2 model from Tesla, which allows full independence from the grid.  The comparative cost matchup looks favorable, and the future should be better yet.  Having local community networks would be still better.
Carl

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