David Tracey is a writer, designer and community ecologist. He is the Executive Director of Tree City and co-creator of the TreeKeepers program which helped residents add 9,000 trees to the urban forest in Vancouver. He is the author of six books including Guerrilla Gardening: A Manualfesto, The Earth Manifesto: Saving Nature with Engaged Ecology and Vancouver Tree Book which reached No. 1 on the BC Bestseller list.