Ann Arbor officials says some of the trees in the city are dying, and they attribute it to leaks in the DTE Energy natural gas infrastructure. The utility says it is not the problem. The city is asking DTE to conduct necessary repairs, while the utility argues it would be cost prohibitive to contract an arborist to evaluate potential methane damage to trees. What comes next? WEMU's David Fair discussed it with Ann Arbor Sustainability and Innovations Director, Missy Stults.