There is one problem with fossil fuels. Its a limited resource; therefore, we need a mix of fossil fuels and renewables. But we can't depend only on one type solely.
One of our main problems is population growth. Now that DJT is moving Space Command to Huntsville, AL it is going to nearly double the population there. And traffic is bad enough that weekday morning is backed up for over 1-1/2 hours. All those sitting in traffic jams is not helping the pollution levels at all, not to mention how nerve racking it is. Just went to Walmart today and even Sunday the traffic was terrible. Just think what another 100K+ people is going to cause.
On the carbs it is also OEMs not allowing independent shops have access to necessary tools, just so their dealers can charge a large fee for doing it. And they are also making out like we are idiots that can't read and follow instructions. Without being able to tune an engine, it can be place in service and pollute even more.
I know some techs that work for dealers that can't even figure out how to get out of a wet paper bag with both ends open.