Complex sentence: The banking pavilion possesses a living roof, which was installed as part of Cadillac Fairview's goal of having the entire complex LEED-certified by 2013 and was intended to help protect the building from solar-heat gain and reduce storm runoff.
Split into simpler sentences: The banking pavilion's living roof, was installed as part of Cadillac Fairview's goal of having the entire complex LEED-certified by 2013. It is intended to help protect the building from solar-heat gain and reduce storm runoff.