Cloudy and cold
Rises at 7:41 AM with 9:19 of sunlight, then sets at 5:00 PM
Rises at --:-- with of moolight, then sets at 11:34 AM
Dec 5, 2013; 5:00 AM ET December is a popular month to travel because of the holidays. Some of that travel is not helping the environment. Valerie Smock explains which mode of transportation is best for the Earth.