Thanks for the information on Alberta.  I already took a bath with NXG in BC.

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An American Depositary Receipt (or ADR) represents ownership in the shares of a foreign company trading on US financial markets. The stock of many non-US companies trades on US exchanges through the use of ADRs. ADRs enable US investors to buy shares in foreign companies without undertaking cross-border transactions. ADRs carry prices in US dollars, pay dividends in US dollars, and can be traded like the shares of US-based companies. Each ADR is issued by a US depositary bank and can represent a fraction of a share, a single share, or multiple shares of foreign stock. An owner of an ADR has the right to obtain the foreign stock it represents, but US investors usually find it more convenient simply to own the ADR. The price of an ADR is often close to the price of the foreign stock in its home market, adjusted for the ratio of ADRs to foreign company shares. Depositary banks have numerous responsibilities to an ADR holder and to the non-US company the ADR represents. The first ADR was introduced by JPMorgan in 1927, for the British retailer Selfridges&Co. The largest depositary bank is the Bank of New York. Individual shares of a foreign corporation represented by an ADR are called American Depositary Shares (ADS).