CALGARY Developers were challenged with building a community on an old army base and keeping as many of the historic trees, many of which were planted when the base was built in the 1930s, as possible. Canada Land Company did just that. The trees are something people value and rather than removing that we wanted to incorporate it and develop and make a positive attribute in the community, said Kelvin Whalen, senior director of real estate for Canada Lands Company. In honour of Earth Day April 22, the community will launch the ‘Currie Tree & Treasure Hunt’ to help guide the exploration of some of Calgary’s oldest and largest trees.