Watch for a strong morning thunderstorm; cloudy and warm
Rises at 6:01 AM with 15:16 of sunlight, then sets at 9:17 PM
Rises at 12:33 AM with 10:33 of moolight, then sets at 11:06 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.