Varia No 121, 2020/3 - 107 pagesPages 1 to 3EditorialBy Jean-Baptiste Bahers, Valérie SchaferPages 4 to 28“Under your feet, a wonderful system”: The transformation of Montreal’s urban energy landscape, 1890-1950By Clarence Hatton-ProulxPages 29 to 51Incentives and obstacles to the deployment of the residential gas network in Arequipa, Peru: An impossible mass diffusion of natural gas?By Nina Montes de OcaPages 52 to 66Mobility trajectories: A key concept for thinking about and supporting changes in travel practices?By Laurent Cailly, Marie Huyghe, Nicolas OppenchaimPages 67 to 89The Cascadia Corridor (Northwest of the United States): A limited territorial anchorage for a growing interurban rail serviceBy Matthieu SchorungPages 90 to 101Private companies under cyberattackBy Rhéa EddéPages 102 to 107A curve to warm up well. Heating temperatures recommended in the 20th centuryBy Renan Viguié
