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Created with Fabric.js 1.4.5 Climate Change and Allergies Since the industrial revolution, the percentage of carbon dioxide has increased by 30%, causing global temperatures to rise, contributing to climate change. Climate change Ragweed:20 daysearlier Oak:16 daysearlier Grass:7 daysearlier Effect of carbon dioxide on allergens from Ragweed Plants 270m above sea levelWarmer by 1-2.5 C Average change in amount of pollen in Europe 1969-2003 OAK2.85 x more BIRCH3.2 xmore GRASS0.6 x more equivalent to:20% Concentration of Allergens from Birch Trees in Finland Birch:15 days earlier Average change of start in pollen season in Europe in 4 trees: Plants grown in environmentalchambers using pre-industrial levels, current levels and projected futuristic levels of concentration of carbon dioxideshowed that the concentrationof allergens increased significantly, and nearly doubling. These projections suggest that the health of those withallergies will worsen and more peoplewill become sensitive to pollen andincrease health costs. Pollen season occurs through-out the year,but changes arehappening.The winter season is becoming shorter, while thespring,summer and autumn flowering seasons are increasing in length. This increases the likelihood of allergic reactions, hay fever and asthma attacks occuring Plants grown in the USA in environmental chambers, greenhouses and outdoor fields were exposed to high amountsof carbon dioxide and temperature showed an increase in pollen production ranging from1.6-1.9 x more pollen than in control plants Although most of the informationis from Europe,it can be applied to North America,as climate change affects the whole world.
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