Why are Scientific studies ignored?

The London Plane tree is a self serving hazard it produces 30 times more defence gas than native trees and spews out trichome dust and achene dust and spikes. No birds, possums nest in them because they’re unhealthy to live in or be under! 

The London Plane tree is the box jelly fish of trees!

So why does the Council love them so much it’s all about $$$$ they are low maintenance because nothing will damage them but the sun and drought! But they will spew out more gas and organic pollution as they die just to make things worse for those who live around them.

https://www.sciencedirect.com/science/article/abs/pii/S1081120611006508#:~:text=Background,irritation%2C%20rhinitis%2C%20and%20conjunctivitis