thousands of volunteers helping the park gardeners a block away at invasive radish, mustard, harry dandelion, french a broom, sheep sorrow, and many more. until we see that a wonderful wave of volunteerism sprouts up, i will continue to support the small-scale use of herbicides by highly trained project -- professionals who follow the integrated pest management guidelines. what about residential use? i can go to lowes or kohl's and buy a gallon myself and spray it without any regulation at all. getting this down to 2 gallons is pretty amazing compared to what residents are using. thank you. >> thank you. our next speaker is mary ellen hammond. i am sorry if i mispronounced. it is mary ellen hannibal and i am an environmental journalist. my most recent book is called citizen scientist searching for heroes and hope in an age of extinction and the volunteers that we do have, thousands of volunteers in the city, removing invasive plants and planting native plants, are citizen scientists and heroes. and what we are doing is protecting native ecosystems here in san francisco. and just to tap back