Of particular criticism was the removal of the "Cana" in EnCana, which was thought to symbolize the changing of headquarters from Calgary to Denver. Encana's departure "only intensified the gloom enveloping the Canadian energy industry after foreign companies sold more than US$30 billion". Youssef Youssef, a commerce professor at Humber College in Toronto, also takes this perspective, citing the difficulty in changing a brand as recognizable as this one "(Encana) was a solid brand and it had resonance within the Canadian oil industry, and everybody knows the company, so to change the brand, it takes a lot of steps.”