Tree management

Good day Recently I attended a site to discuss the risk of a damaged tree while their the client asked my opinion on other native Iron bark trees Indigenous to the area as the client would like these trees removed and replace them with trees that do something such as fruit trees. I was a bit disappointed on this attitude which many seem to have so what do trees do do they do anything 1/ they produce Oxygen we need to breath, provide shade, slow storm water from washing away from soil, provide habitat to many of our native fauna and insects to save tree especially trees Indigenous to an area is also very important as so many people just want to cut trees down because they are big and inside a stupid meter rule