Why do we still have allergies if humans have lived around plants for a long time?
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One reason is that apparently in the USA we plant mostly male trees because apparently cleaning up the nuts from female trees was considered inconvenient. All these male trees release their pollen with not enough females to recieve and our environment ends up covered in what is essentially tree sperm.
This unnatural selection has changed the ecosystem of plants and humans amd lead to a significant spike in allergy related issues.
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