To add insult to injury: the Liberals don't require tanker operators to account for all of the upstream and downstream CO2 emissions but they expect pipeline operators to do so. It is nonsense.
You are right, the climate change denier lobby groups have completely destroyed any proper GHG accounting. We should have had a decade or more of C02 taxation, with proper assignment of C02 emissions on both domestic and imported goods. Will you join me in asking for proper emissions regulations, accounting, and taxation?
A lot probably had to do with a pipeline being a non starter with Quebec. Quebec seems fine with the St. Lawrence being filled with tankers bringing oil from North Africa but not with Canadian oil going in the other direction.
For the second year in a row, Canadian imports of petroleum have declined. It was down 12% in 2017.
Here is the 2017 snapshot by source country:
United States - 52.9%
Saudi Arabia - 15.2%
Azerbaijan - 7.8%
Norway - 5.7%
Nigeria - 5.6%
Algeria - 4.8%
United Kingdom - 3.0%
Colombia - 1.3%
Angola - 1.0%
Russian Federation - 0.9%
Kazakhstan - 0.8%
Ivory Coast - 0.5%
Iraq - 0.4%
Mexico - 0.0%
Ghana - 0.0%
Oman - 0.0%
France - 0.0%