Bloomberg: Mayor Axel Pruemm makes no apologies for his town — the biggest source of greenhouse gases in Europe. The area near Grevenbroich, Germany’s self-proclaimed “capital of energy,” boasts 27 lignite-fired boilers at three generating stations. The plants and mines that feed them bring jobs and corporate sponsorship. They’re also responsible for the largest concentration of carbon dioxide emissions in Europe, thrusting the town to the forefront of the climate-change debate. …