Allergy causing pollen has been arriving earlier in many parts of Canada in recent years. Researchers say climate change is having an effect on allergy seasons, making them weeks longer and contributing to higher concentrations of pollen in the air.
Allergy causing pollen has been arriving earlier in many parts of Canada in recent years. Researchers say climate change is having an effect on allergy seasons, making them weeks longer and contributing to higher concentrations of pollen in the air.
