This won't be the popular opinion here but it doesn't matter if you believe in climate change or not. If we believe we need some form of government, we need some form of taxation to fund the government and whatever services it provides. Whether that is just courts, police and military or more, it needs to be funded. I believe in the non aggression principle. It is the ethical stance that aggression is inherently wrong. In this context, aggression is any interference with an individual or their property. It is central to right wing natural rights philosophy. Related to taxation, anything that interferes with my individual rights and freedoms should be taxed. Your income does not interfere with my individuality and thus should not be taxed. However, when you take away from the collective commons it should be. So property taxes are inherently ethical because you owning land limits me from using that land. Taxes on any form of pollution are ethical. If you pollute my water supply or air I either cannot make use of these resources, have to clean the resources or pay to have it cleaned before I make use of it or I have to suffer the health consequences of using contaminated water and air. My right to health was impacted by something someone else did and thus they should pay into the public good. With that in mind, if you buy fossil fuels you will burn them and emit pollutants into the air, you should be taxed on that. The tax should not be transferred to the provinces to do what they wish, it should be used to address the reason for the tax.
Income tax, capital gains tax or any other taxes on my labor is unethical. Taxes on property, pollution (carbon), use of the commons that violates the NAP, etc. are ethical.