Imperial Oil chief executive John Whelan has stated his opposition to Alberta separatism, making this the first major energy company in the province to take a public position on the movement, Financial Post reported, citing Bloomberg. "As a national company, we believe a united Canada is the strongest position we can take to face the challenges and opportunities ahead," Whelan told a Calgary conference, adding that "Canada and Alberta work best when people, products, energy and investment can move freely and reliably across the country." …