In Japan an overabundance of farmed trees is actually thought to be responsible for larger, worse allergy seasons: https://www.theguardian.com/world/2023/apr/06

In Japan an overabundance of farmed trees is actually thought to be responsible for larger, worse allergy seasons: https://www.theguardian.com/world/2023/apr/06/japan-declares-war-on-pollen-as-hay-fever-epidemic-grips-the-nation https://www.theguardian.com/world/2023/apr/06/japan-declares...