A carbon tax and rebate along with a similar carbon tariff on imports is by far the best way to combat climate change. Efficiently price the externalities caused by emitting CO2 and let the market fix the problem itself. The rebate ensures that the carbon tax is not regressive.

But to work properly, the carbon tax needs to be above CAD100 per ton, almost doubling the price of gas.

But that's unpalatable to most, so instead they have to resort to far inferior measures like electric car subsidies.