Considerable cloudiness with a couple of showers and a thunderstorm; humid
Rises at 6:05 AM with 15:08 of sunlight, then sets at 9:13 PM
Rises at 10:44 AM with 13:32 of moolight, then sets at 12:16 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.