How about de populating and concerntrate on tourism which is completly sustainable and environmentally friendly.  That coupled with agriculture would provide a sizeable province that would be the envy of the world. 

You may have to decomission a few cities but that would be a good thing for all, and the people left working in paradise would indeed have a wonderful life, void of all the toxic mess this oil development has brought to the province. Thousands of windfarms surplanting the oil sands along with wind power could power the whole province. Plus the grizzleys would thank all.