Urban planning is a factor too. Someone decided that trees dropping fruit everywhere was messy, so urban planners made a blanket recommendation to only plant ma

Urban planning is a factor too. Someone decided that trees dropping fruit everywhere was messy, so urban planners made a blanket recommendation to only plant male trees. https://blogs.scientificamerican.com/guest-blog/botanical-sexism-cultivates-home-grown-allergies/ https://blogs.scientificamerican.com/guest-blog/botanical-se...