Living on Earth: YOUNG: The auto industry’s just one area where President Obama has tried to steer energy, the environment and the economy together during his first hundred days in office. To get an idea of what’s happened in those hundred days, consider just one day: Monday, April 27th: On that day, the Environmental Protection Agency indicated it will toughen rules on pollution from power plants. The Interior Department reversed rules that let mountaintop removal coal mines dump waste near streams. …