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Kees van der Leun @Sustainable2050
, 4 tweets, 2 min read Read on Twitter
Confirmed: Atmospheric CO2 measured at Mauna Loa averaged 410.3 ppm in April. First time a monthly mean exceeded 410 ppm, just four years after the 400 ppm line was crossed.
Since I was born, CO2 at Mauna Loa crossed:
320 ppm in May 1960
330 in May 1972
340 March 1980
350 May 1986
360 May 1993
370 April 1999
380 April 2004
390 May 2009
400 April 2014
and 410 ppm in April 2018
I apologize for any inconvenience caused.
Years it took us to drive up CO2 by 10 ppm:
320 → 330: 12
330 → 340: 8
340 → 350: 6
350 → 360: 7
360 → 370: 6
370 → 380: 5
380 → 390: 5
390 → 400: 5
400 → 410: 4
That’s making the climate crisis worse faster.
Remember when we entered the new millennium, with fresh chances to reduce global CO2 emissions? In 2000, atmospheric CO2 at Mauna Loa peaked below 372 ppm. Now it has already exceeded 410. No more foot-dragging please.
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Germany made it! Over 40% renewable electricity* in 2018, for the first time ever. After 38.2% in 2017, now 40.4%.
Nuclear 13.3%, fossils 46.3%

*) based on net power generation for the public grid.
Thx Bruno @energy_charts for your data and charts!
In 15 years, the share of renewables in German electricity quintupled, from 8.5% in 2003 to 40.4% in 2018.
Since just before its nuclear exit (2010), it gained 21%-points.
That meant that renewables were able to replace the electricity from the nuclear power plants shut down since 2011 (Fukushima), and reduce electricity from gas (-35%) and hard coal (-25%) at the same time. Lignite (brown coal) use remained stable, due to its low marginal cost.
Read 5 tweets
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Reading the draft NL Climate Agreement:
klimaatakkoord.nl/binaries/klima…
Lots of good content! Will share some observations with you here. On page 28 now ;)
The often mentioned changes in residential energy taxes proposed are less than spectacular. Gradual increase in tax on fossil gas: +€0.10/m3 by 2029. Would mean +€150/year for an average household not reducing gas use over that period. But: €65 fixed reduction in energy tax...
.. and reduction of tax on electricity by €0.03/kWh over the same period. That’s -€90/year for an average household.
Net result: zero. Or negative, if the household saves energy.
The shift from electricity to gas is to bring taxes more in line with CO2 emissions.
Read 16 tweets
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Since I have a CO2 monitor, I know that 600 ppm of CO2 in a room starts make me feel I could use some fresh air. Aside from climate disruption, do we realize that’s were we’re heading for our *outside* air under not-too-extreme emissions scenarios?
Graph: @skepticscience
And, given that sensitivity of the human body and brain to CO2, might it be that the jump in atmospheric CO2 from 278 ppm (pre-industrial) to the present 410 ppm already has an effect on us?
Or, come to think of it, could it be that I'm already affected by the difference between the 325 ppm in the air around us when I was a kid, and the 410 ppm that we experience now?
Read 9 tweets

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