carbon footprint

What’s your carbon footprint? You probably have no idea

Most Americans who want to diet can guess how many calories there are in a hamburger. But do people who want to reduce their impact on the environment understand how much carbon is emitted when a car uses a gallon of gas? The answer is no, according to a new study by Northeastern researchers. Most of those surveyed consistently underestimated carbon emissions, including those who called themselves environmentally “savvy.”