Barton Bund talks with Arborist Jack Richardson, founder and CEO of Guardian Tree Experts. The Ann Arbor tree care company approaches the work from a scientific point of view, helping clients preserve their trees, not just cut them down. The young entrepreneur talks about how he started his business on the right ethical foot, and where he sees it growing. Environmental ethics and business ethics are a constant balancing act, in a town with as many trees as this one.