He says this occurred because of energy efficiency efforts and shifts to cleaner sources such as natural gas. (news.nationalgeographic.com)
Meanwhile, overall energy use in the country fell 4.8 % due to warmer temperatures and increasing efficiency efforts, further boosting the value of solar generation. (kunstler.com)
On a more discreet level, household efficiency efforts require promotional campaigns in order to win over a skeptical public. (scientificamerican.com)