ScienceDaily: Airborne concentrations of common ragweed pollen, a potent allergen, could increase fourfold in Europe by 2050. Researchers believe climate change will be responsible for two thirds of this increase, while the remainder will be due to the plant's spread, as a result of human activity. These estimates by researchers from the CNRS, CEA, INERIS and RNSA , in collaboration with several European institutes, show that it is now necessary to implement coordinated management of this invasive plant on the...