Scotsman: MORE than half of us could be suffering from hay fever by 2060, a researcher has claimed. Professor Jean Emberlin said the number of people with the condition will shoot up from the current level of around 24 per cent of the population to around half. Climate change is playing a role by altering the length of pollen seasons for trees and plants, she believes. For example, the birch pollen season, which affects around one in four people with hay fever, is now seen up to a month earlier …