 A few non-Chinese sources such as the advanced Hoidas Lake project in northern Canada and Mt Weld in Australia were under development, however it is not known if these sources will be developed before a shortage hits.In order to encourage the purchase of HEVs, several countries have introduced legislation for incentives and ecotaxes.Residents of Ontario and Quebec in Canada can claim a rebate on the Provincial Retail Sales Tax of up to $2,000 CDN on the purchase or lease of a hybrid electric vehicle.