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| Today | Normal | Record | 5/23/2012 | |
|---|---|---|---|---|
| High | 93° | 96° | N/A | 102° |
| Low | 63° | 62° | N/A | 73° |
Rises at 5:38 AM with 14:02 of sunlight, then sets at 7:40 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.