I have never denied climate change, changing has what it has always done, day to day, year-on-year, decade on decade - if you have been around long enough to notice, what I do not accept is that change is man made, or that we can do anything to stop it.
The isotopes in the CO2 in the atmosphere show you are wrong. The proportion of isotopes shows us that they largely come from fossil fuels, which means its down to mankind.
Before the Paris agreement, we were looking at 4C increase, which would have been.... disastarous. I mean really bad.
Now we are looking at 2.7C warming average increase (with an error bar (+2.2 or 3.7C)) thanks to all those COP conferences.
Its good, but its not enough. We need to do far more if we want to achieve under 2C warming. 1.5C would better, but unrealistic at this point.
Make no mistake, this is not just the green movement, this is industry saying this as well, I've been to conferences with industrial reps, all agreeing that we need to cut carbon emissions. Exxon knew about the consequencies, and lied about it. BP tried to blame consumers.
There are changes we can make that actually will save society money, such as building cycling infrastructure, and insulating buildings more (the latter may require carbon taxes of course, to address Jevons Paradox). But they have economic benefits. They don't cost us in the long run, they will pay for themselves.
When you account for the impact of fossil fuels, and account of the externalities, stopping using petrol/diesel cars make far more sense in terms of money. Unless you want to live a subsidised life, like those living off benefits.