Gone from this year's presidential campaign are most mentions of climate change, environmental pollution, or green jobs. Former Gov. Mitt Romney, the GOP presidential nominee, prefers to call attention instead to the country's continuing dependence on foreign energy sources.
"I will set a national goal of North American energy independence by the year 2020," Romney declared in August.
The line is now a standard part of Romney's stump speech, and he repeated it in his first two debates with President Obama.