We _DON'T_ have the tech.
We _CAN'T_ leave the fossil fuel in the ground. The transportation sector sees to that. There is no "renewable" fuel that will put an 18 wheeler across the country, a ship across the ocean, or an airliner across the sky at a price that WE CAN AFFORD. It has to be affordable or we can't do it. The Navy has been flying some jets on bio-diesel, which we may or may not have enough farmable land to eliminate fossil fuels entirely, but at $6 a gallon. We can't afford that, and we're not going to be able to afford that. Meanwhile, there's been armies of scientists attempting to find battery chemistry significantly better than lithium and they're getting nowhere. Having a Tesla at its going price does the guy working for $50K a year absolutely no good, and yes, he HAS to have auto transportation. That's how our society runs. We need cars, we need trucks, we need those ships and planes. There's nothing we can do about until and unless we find the "magic" battery. The magic battery is cheap and high capacity and cheap and rugged enough for automotive use and cheap and recharges efficiently and maybe quickly (if it doesn't, we'll exchange it for a charged one) and cheap and light enough for automotive use and cheap and small enough for automotive use. And cheap. We don't have that battery. We many never have that battery because it may not be possible to build it.
One thing's for damned certain, this is going to be solved in a laboratory or not at all. It won't be solved by some government making fossil fuels expensive. That will not make the magic battery magically materialize, it will only pauperize the citizenry and cast more and more people into poverty, killing millions. What's more dangerous than smoking? Living in poverty is more dangerous than smoking. Smoking will take 7 years off your life. Living in poverty is worth 10 fewer years due to things like not being able to afford the best medicine, not being able to live in a house and dying of exposure or criminal activity while living on the street, not being able to afford enough food, etc. Politicians can force us to live on the street, but they can't solve using fossil fuels with any law. We have to burn them just to survive.
Those that are scared silly for the future have 1 option, and it isn't marching up and down Pennsylvania Avenue with a sign, sandals, and long hair. It is to get their PHD in electrochemistry and maybe one in materials science, get their butts into a lab somewhere, and invent for us the magic battery. THEN we can use all those wonderful solar and wind electric plants to do trucks, ships, and airplanes as well as cars. Again, the magic battery may be impossible. If so, we're going to have to get good at geo-engineering, something that also is not going to be solved by some tax or law or anything, but in a laboratory.