As record temperatures scorch Canada, you may find yourself walking on the shady side of the street, or ducking under a tree. But in many cities, keeping public spaces sunny has long been a key priority. The Globe and Mail's architecture critic Alex Bozikovic explains how sun and shade wars have broader implications on critical city infrastructure. Then, Saroja Coelho speaks with environmental journalist Sam Bloch about how prizing sun over shade has cast a long shadow on urban design and public health in our warming world.