Why so many people have allergies?

I don't have allergies, but this is an interesting book.



It's about how so many people are bothered by pollen, because landscapers only plant males to avoid the mess of fruit. I suppose it is unnatural to have only male plants in so many places. I know the Gingko Baloba tree is male and female, and they only want to plant males in the city, because the females make a mess with the fruit.