It Eats CO2 for Breakfast
By ANNE RAVER
PHILADELPHIA
POISON IVY is one of those weeds proliferating like mad as rising levels of greenhouse gases like carbon dioxide heat up the atmosphere. Researchers at Duke University who studied the weed between 1999 and 2004 in a controlled forest area near Chapel Hill, N.C., where high levels of CO2 are pumped into test plots, found that poison ivy not only grew more vigorously, but also produced a more toxic form of urushiol, the resin that causes its rash.
By ANNE RAVER
PHILADELPHIA
POISON IVY is one of those weeds proliferating like mad as rising levels of greenhouse gases like carbon dioxide heat up the atmosphere. Researchers at Duke University who studied the weed between 1999 and 2004 in a controlled forest area near Chapel Hill, N.C., where high levels of CO2 are pumped into test plots, found that poison ivy not only grew more vigorously, but also produced a more toxic form of urushiol, the resin that causes its rash.