Why hay fever season might feel worse this year

Hay fever season is descending, and for the unlucky among us who develop seasonal allergies, it might feel worse than usual this year. Climate change is thought to be driving a significant increase in grass pollens, which is the most common cause of hay fever in New Zealand. While for some spring and summer simply brings on a few sniffles - for others, especially asthmatics, the cold-like symptoms are enough to disrupt work or social activities. Allergy New Zealand chief executive Mark Dixon speaks with Susie Ferguson.