Canada will need as much as US$60 billion (C$75 billion) to make its oil sands operations net-zero emission businesses by 2050, top executives at the biggest oil firms told Bloomberg, adding that the government would need to step up and likely fund up to two-thirds of that cost. Carbon capture and storage is set to make up half of the reductions in emissions, but it may need government support for two-thirds of the cost to implement such projects, as Norway has been doing, Mark Little, president and chief executive officer of Suncor Energy, told…