Project Drawdown has characterized a set of 93 technologies and practices that together can reduce concentrations of greenhouse gases in the atmosphere. It’s a gigantic project with a lot of data and analyses.
In the linked video, the author goes through the measures to find which one is the most cost effective in terms of ratio of rCO2 reduction and economic cost
The maybe surprising result is that building bike infrastructure to shift a not even big percentage of travels from cars to bicycles or ebikes, is very cheap and has a huge effect on emissions.
The premise is that all solutions should be implemented to have a significant effect, but some are easier done than other.
Slowly? It’s already dead in most parts of the country, save for the bigger cities. For example, where I live, I can take a bus between 6am and 6pm, once an hour. Most people wouldn’t be able to get home using public transport. The city has no bus lines in the city itself that aren’t volunteer run.
Luckily the bike infrastructure is pretty good, otherwise it would’ve been a car dependent hell.
Sounds like fun for disabled people.