Hashem Akbari is a professor of civil engineering at Concordia University. His research studies the temperature of cities with the effects of global warming, the shade of trees, the technological changes in buildings, such as lightness of color. Robin Collins asks him to compare these factors with other matters, such as heat pumps, insulation. For the video, audio podcast, transcript, summary, and public comments, see https://tosavetheworld.ca/episode-561-heat-islands-and-trees.