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Climate change may cause longer, more intense allergy seasons

  Increasing temperatures caused by human made climate change and rise in carbon dioxide levels are likely to drive trees, grasses, weeds to produce more pollen, resulting in longer and more intense allergy seasons, according to a study.
The research from the University of Michigan showed that by the end of this century, pollen emissions could begin 40 days earlier in the spring than we saw between 1995 and 2014.
Allergy sufferers could see that season last an additional 19 days before high pollen counts may subside.
In addition, thanks to rising temperatures and increasing CO2 levels, the annual amount of pollen emitted each year could increase up to 200 per cent.
"Pollen-induced respiratory allergies are getting worse with climate change," said Yingxiao Zhang, graduate student research assistant from the varsity.
"Our findings can be a starting point for further investigations into the consequence of climate change on pollen and corresponding health effects," Zhang added, in the paper published in the journal Nature Communications.
The team developed a predictive model that examines 15 of the most common pollen types and how their production will be impacted by projected changes in temperatures and precipitation.
They combined climate data along with socioeconomic scenarios, correlating their modeling with the data from 1995 through 2014.
They then used their model to predict pollen emissions for the last two decades of the 21st century.
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