Climate change over the last few decades has been increasing very rapidly. This results in many issues that affect humans and the way plants pollinate. The cause of climate change is primarily due to the increase in carbon dioxide and green house gases. For example, in the reading, it states that " Birch trees growing at higher temperatures produce pollen..." (p.1074). Consequently, this also increases the amount of allergen that travels in the air. To certain people with respiratory problems such as asthma could potentially be at higher risk. Also, the start of the pollination season has neared and the end is extended in several parts of Europe. Although plant pollination can travel long distances, fungi can cover even longer distances. All of these factors can cause damage to airway mucosal. 

Methods:

Many studies and experiments throughout Europe occurred by testing controlled areas Vs. high CO2 concentrated areas that show an increase in pollen re productiveness.

Conclusion:

The increase of climate change over the next century could be a global risk to people with respiratory problems but also the plants and fungi that are producing an increasing amount of allergenic pollen.