One problem with the section on Canada is that they look at CO2 extraction. Canada looks like a big contributor here because it's a net exporter of fossil fuels. However, focusing on supply hasn't worked at any point to date and isn't likely to work at any point in the future. As long as people are buying fossil fuels, extractors are going to produce them and find (less efficient/more dangerous) ways to get them to market if infrastructure like pipelines are blocked. The only efforts that have ever successfully curbed fossil fuel production
temporarily were OPEC's self-imposed caps, which were entirely motivated towards maintaining high oil prices and
not reducing CO_2 emissions.
It seems logical to address the demand instead, but this is hard too. EV's are a promising technology, but have next to no impact at present. A few of the richer people in the richest nations on Earth can afford them, but that's it. We need to find ways to curb fossil fuel consumption by typical drivers in places like Mumbai and Shanghai. The problem is, battery technology just isn't getting cheap enough fast enough. If we could produce a sub $5000 compact EV today, it would still take several decades for them to replace the majority of cars currently in use. EV's also need to be able to compete in agriculture, where vehicles need to be capable of endurance well beyond road cars.
If we want to get CO_2 levels under control quickly we're basically going to have to tax gasoline to the point where people are forced to drive less and pay more for everything that uses fossil fuels in their production, including food. We might even need a mileage tax that scales with income so that the rich are forced to drive less too. Unfortunately, this basically means asking politicians around the world to fall on their swords and take one for the planet.
If we can't address supply or demand, all we can really hope for is to develop the technology to get us out of this bind. Either a magical battery/capacitor technology, scalable carbon sinks, or some kind of geoengineering project like a space-sunshade to partially block the sun. It's risky to wait for tech to be developed, and perhaps even riskier to engage in geoengineering projects that may have unintended side-effects. I like the sunshade idea[1] because it's easily reversible, but it's still risky and nobody is seriously working on the idea as far as I know. However, it seems as though putting payload into orbit might become radically cheaper before EV's have a global impact. This option may be more attractive in a decade or so, and may be a more important use of commercial spaceflight capability than starting a colony on Mars.
A lot of people are against any form of geoengineering because they believe it will give people hope for an easy solution without the need to curb our use of fossil fuels. The problem is, people are already hoping that easy solutions, like EV's, will enable them to carry on as usual without serious sacrifice. Given the global lack of will to sacrifice quality of life for the good of the environment, we need to have other options available.
[1]https://en.wikipedia.org/wiki/Space_sunshade