[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/POLITICS/06/24/campaign.wrap/art.mccain.gi.jpg caption="Sen. John McCain is pushing energy efficiency and conservation on the campaign trail."](CNN) - Sen. John McCain on Tuesday told voters that energy efficiency "should begin at home" and proposed that the federal government purchase more environmentally friendly vehicles.
"Every year the federal government buys upwards of 60,000 cars and other vehicles, not including military or law-enforcement vehicles," McCain said.
"From now on, we're going to make those civilian vehicles flex-fuel capable, plug-in hybrid or cars fueled by clean natural gas. If our great goal is to move American transportation toward lower carbon emissions, then it should start with the federal fleet."