France’s suspension of a fuel tax increase after violent protests signaled the perils that governments in wealthier countries may face in setting policies to fight climate change. A pastry maker from northern France, Vincent Picard describes himself as a “militant ecologist” — one who also joined the so-called Yellow Vest protests a movement set off by a planned increase in France’s gasoline tax. Mr. Picard, 32, acknowledges that a gas tax might encourage conservation. But he has to drive to work every day. The nearest train station is 35 minutes away. The trains run only once an hour, and soon perhaps even more infrequently as the government looks to save costs on rural routes. “I am conscious that we have reached the end of fossil fuels and that we have to modify our habits,” he said. “They are asking us to to be […]