Associated Press: Global warming will bring much more sneezing and wheezing to Europe by mid-century, a new study says.
Ragweed pollen levels are likely to quadruple for much of Europe because warmer temperatures will allow the plants to take root more, and carbon dioxide will make them grow more, says a study published Monday in the journal Nature Climate Change. Other factors not related to man-made climate change will also contribute.
Ragweed isn't native to Europe, but was imported from America in the late...