Spiegel: The German government’s new energy plan would require most houses in the country to be modernized and made more energy-efficient. Chancellor Angela Merkel’s plan to make Germany’s residential buildings the most energy-efficient in the world has run into resistance within her cabinet. The project’s price tag could be as high as 2.4 trillion euros — and the minister responsible told SPIEGEL it is impracticable. It was Berlin’s decision to extend the lifespans of the country’s …