In April 2009, Toronto Maple Leafs and Air Canada Centre officially launched their Team Up Green initiative as part of Maple Leaf Sports & Entertainment's (MLSE) ongoing commitment to the environment and sustainability.

In early 2007, e3 was retained to support the development of  a green strategy for the Air Canada Centre. The ACC hosts over 260 events each year, including Maple Leafs and Raptors games, as well as live events. With over 20,000 fans at each event, the organization realized that they could have a large impact within their community and with their fan base. They calculated their 2007 carbon footprint and developed a green strategy to reduce their footprint and engage fans. This coordinated program is a true integration of reduction programs and community outreach.

The Air Canada Centre is in its third year of a five-year plan where Canada's premier sports and entertainment venue will invest $5 million to reduce its overall carbon footprint. The venue's environmental initiatives include: reducing its energy consumption and its greenhouse gas emissions by 30 percent, re-engineering Air Canada Centre's mechanical and electrical operations, and implementing a waste diversion program.