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Prof. Dr. Dr. hc mult. Hans-Werner Sinn, President of the ifo Institute (ret.), Munich Seminar, December 16, 2019 https://www.ifo.de/node/49956 Climate change must be combated. But how? Prof. Sinn shows that politicians have used many useless and expensive instruments that demonstrate great activism, but achieve little other than sinecures for certain subgroups of society. The Renewable Energy Sources Act is ineffective, and the volatility of wind and solar power will hardly be able to be tamed. Electric cars are not per se more environmentally friendly. Fuel quantities that Europe no longer uses are delivered elsewhere. The resource owners may extract even more than before for fear of expropriation, and what is extracted is also burned. The lecture advocates a return to nuclear power, reforestation and a global emissions trading system enforced by a club of the willing.ifo Institute – Leibniz Institute for Economic Research at the University of Munich eV