next speaker, please hi katherine howard i'm up here as co- latter damage. however, last time at the coalition for san francisco neighborhoods there was a presentation by the forestry alliance and they talked about how the canopy is diminished in the city and county of san francisco. the effort alliance said the park is more interested in removing trees than protecting them. i don't know. and the trees are given a bad rap about falling brandishes. my comments are general but i want to give you some hints about things to think about when people want to remove trees one is the sewer line if the sewer line is sealed the roots don't know they're there. so if they get into the pipelines that's a problem. sometimes people say there's all this vegetation near the park the park was created so you can't see the traffic. trees on the roofline gosh that sound like a good idea who wants trees that you can see the above everything. one thing not mentioned is proen if a tree is heavy leaning it could be prone. there doesn't seem like there's much effort to mitigate that.