That means all the flowers will start blooming and spreading pollen earlier, making running noses and sneezes even worse.
Hay fever happens when people have an allergic reaction to the pollen, and the idea that the pollen will arrive earlier and hang around later is really bad news.
More people suffering
It's not just flowers that cause the fever. People mowing their lawns all year round also makes things worse.
Hay fever is affecting more and more people every year, with the number of sufferers in Britain having risen by about 10% in the last 30 years.
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