Based on past pollen counts and expected weather conditions, pollen levels for Saturday will remain stable in the moderate range. Pollen producing plants are at a relatively steady level of pollination at this time.
Smog Threatens Visitors to U.S. National Parks: Report
FRIDAY, July 31, 2015 (HealthDay News) -- Air pollution afflicts many national parks across the United States, a new study suggests.
Air quality in some of the parks is as bad or worse than in some major cities because of pollution from sources such as coal-fired power stations, the National Parks Conservation Association ... Full Article »