After the Foundation implemented its Ethical Gift Acceptance Policy, it no longer accepted donations from fossil fuel industry corporate donors as it had in the past. Prior to the Ethical Gift Acceptance Policy, the Foundation had received funding from the EnCana Corporation, a world leader in natural gas production and oil sands development, and ATCO Gas, Alberta's principal distributor of natural gas, and OPG which is one of the largest suppliers of electricity in the world operating five fossil fuel-burning generation plants and three nuclear plants.