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| Today | Normal | Record | 5/23/2012 | |
|---|---|---|---|---|
| High | 64° | 72° | N/A | 88° |
| Low | 36° | 49° | N/A | 62° |
Rises at 5:36 AM with 15:08 of sunlight, then sets at 8:44 PM
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.