Several readers share a report: Germany is widely seen as a world leader in the fight against climate change. Thanks to its investments in renewable power, wind and solar energy provide a third of its electricity, more than double the U.S. share. Germany's goal to lower carbon-dioxide emissions 40 percent by 2020 is significantly more ambitious than that of Europe as a whole or the U.S. After the U.S. withdrawal from the Paris climate accord, Chancellor Angela Merkel vowed even greater determination. "We can't wait for the last man on Earth to be convinced by the scientific evidence for climate change," she explained. But there's another, troubling side to the German story: The country still gets 40 percent of its energy from coal, a bigger share than most other European countries. And much of it is lignite, the dirtiest kind of coal. As a result, Germany is set to fall well short of its 2020 goal. This dependence on coal is partly a side effect of Germany's abandonment of emissions-free nuclear power and partly foot-dragging on the part of a government wary of alienating voters in German coal country. During the summer election campaign, Merkel largely avoided the subject.