Canada

Solution X wasn't 100% effective, hence solution X was ineffective.

We're talking about federal policy. Stuff that the federal government can do. Can it do more? Definitely. Is it actively doing stuff contrary to what would be considered as "climate protection"? Yes. But that does not make carbon taxes good or bad policy.

The logic behind taxing carbon is the following:

• carbon emissions are a negative externality
• taxing something tends to reduce that behavior
• subsidizing something tends to encourage that behavior.
• a tax that taxes consumption of goods, where the act of consumption and production of that specific good leads to carbon emissions, discourages consumption of that good. The collected tax was redistributed to folks.

The effect of the above was simple. If you lived a lifestyle that resulted in more carbon emissions, you suffered a loss. If your lifestyle involved less carbon emissions, you profited. Regardless, the tax encouraged you, and through your consumption habits, the entire economy to reduce carbon emissions.

Right now, the federal government has dropped the consumer carbon tax and instead increased the industrial carbon tax. The effect is literally the same. Industries pass on the tax to consumers. Except, you don't get a rebate anymore lol.