Negli scorsi giorni sono stati ripostati più volte contenuti sulla transizione energetica in Germania, utilizzati per trarre conclusioni faziose e fuorvianti. Per questo, vorrei fare alcuni 🧵 per fare un po' di chiarezza. Il primo, questo, riguarda tempi e obiettivi

The experiment is over – we know what does and doesn’t work to address climate If we look at what has been proposed to address global warming, air pollution, and energy security during the past 25 years, only one solution – electrification of all energy sectors and generation of the electricity with wind, solar, geothermal, and hydro sources -- has made an impact. This solution has reduced enough world emissions and technology costs for the @IPCC_CH, to eliminate its worst-case climate scenario. What are the proposed climate solutions that never worked? (1) Fossil gas replacing coal, (2) ethanol replacing gasoline, (3) carbon capture, (4) direct removal of CO2 from the air by equipment, (5) blue hydrogen, 6) nuclear, and (7) geoengineering. We knew these were poor solutions back in 2009, when they were first evaluated. But, it has taken 17 years to overcome lobbyists pushing these techs. On the other hand, electrification of world transport, buildings, and industry and using clean renewables to provide the electricity while growing energy efficiency, also proposed in 2009, has worked, as evidenced by the world growth in electric vehicles, heat pumps, electric furnaces, and clean, renewable electricity generators. All-of-the-above policies, or let’s try everything and hope something works policies, have failed. Given the short time we have, we should never see another IPCC scenario that includes biofuels, carbon capture, direct air capture, nuclear, geoengineering or their derivatives, blue hydrogen, electo-fuels, or sustainable aviation fuels. We know what works. Let's focus on that going forward. References Elimination of most extreme IPCC scenario gmd.copernicus.org/articles/… Components of a WindWaterSolar system web.stanford.edu/group/efmh/… 2009 paper evaluating energy technologies web.stanford.edu/group/efmh/… 2009 paper proposing to transition the world to 100% WWS web.stanford.edu/group/efmh/… More details here: "Still No Miracles Needed" web.stanford.edu/group/efmh/… Video youtube.com/watch?v=OTeXp8RP…