Independent (UK): US President Barack Obama on Tuesday told Americans that insulating their homes to save energy might sound dull and boring, but it was really a sexy subject. Two days before heading to Denmark for the UN climate summit, Obama traveled to a Home Depot hardware store in Virginia to tout government incentives for making homes more energy efficient. “In our nation’s buildings, our homes and our offices consume almost 40 percent of the energy we use and contribute almost 40 percent …