In this photo illustration, Carrie Morris is photographed behind ragweed.
Manuel Lerdau, a biologist at the University of Virginia, checks the flowers of ragweed growing along Rivanna Trail, jogging-biking trail in Charlottesville, Sept. 9, 2013. Lerdau is doing research that looks into the possibility that the ragweed's carbon dioxide production helps to ward off plant-eating beetles. Lerdau also is allergic to ragweed.
Posted: Monday, September 23, 2013 3:00 am
Updated: 8:58 am, Thu Feb 6, 2014.
RICHMOND —People are releasing long-buried carbon dioxide by burning fuels such as coal and oil. That’s bad for much of the planet, scientists say, helping cause global warming. But it’s great for ragweed.
Plants like carbon dioxide, or CO2. It’s their food. But ragweed, the bane of many fall allergy sufferers, really likes it.
Monday, September 23, 2013 3:00 am.
Updated: 8:58 am.