The air concentrations of allergenic ragweed pollen could quadruple in Europe by 2050
Climate change would be responsible for two thirds of this increase, the remaining third would be due to the colonization of the plant as a result of human activities. These estimates, made by a European team of researchers, show that is now necessary to establish coordinated management of this invasive plant in Europe followed by long-term pollen and mapping the presence of plants. These estimates are published in the journal Nature Climate Change May 25, 2015
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