Bloomberg: Energiewende may not be a household word in the United States today, but U.S. citizens and policymakers are likely to hear more about it. Its the name of Germany's ambitious energy transformation, which aims to move the country to at least 80 percent of electricity from renewable energy sources by 2050. Germany already gets nearly 25 percent of its electricity from renewable sources, up from just under 7 percent thirteen years ago. That is no small feat. Germany is a manufacturing powerhouse:...