Research Is Bad News for Allergy Sufferers - Newser

Per NBC News, "using historical pollen data and predictive climate models, the researchers were able to paint a picture of how and when plants and trees could release pollen in the coming decades.” Lead author Yingxiao Zhang of the University of Michigan explained that increased levels of carbon dioxide can boost pollen output in two ways.

First and foremost, carbon and other greenhouse gases are raising temperatures on the planet, and scientists know warmer temperatures can accelerate pollen production.

Also, bigger plants tend to produce more pollen, and the more water and carbon dioxide plants get, the more they can gorge themselves on sugars derived through photosynthesis.