Cloudy this morning followed by clouds giving way to some sun; breezy and colder
Clear and chilly
Rises at 5:25 AM with 14:50 of sunlight, then sets at 8:15 PM
Rises at 6:45 PM with 10:12 of moolight, then sets at 4:57 AM
May 23, 2013; 5:00 AM ET A team has developed a model to determine the influences of humans and climate on vegetation changes. Valerie Smock explains what has the greatest effect.