This weekend, the Great Lakes Renewable Energy Association will hold its 10th annual Michigan Energy Fair at the Ingham County Fairgrounds. There will be exhibitions and workshops on energy efficiency, alternative energy, and sustainable living practices.Current State’s Scott Pohl speaks with the fair’s keynote speaker, David Milarch, co-founder of the Archangel Ancient Tree Archive. Milarch’s stated goals are to propagate old growth trees before they’re gone, archive the genetics of ancient trees, and reforest the earth.