One of the promises of services such as Lyft and Uber (which are called ridesharing platforms but are more like dispatchers for freelance taxis) is that they will reduce the need for car ownership, and that they will bring down the total number of cars driving in cities, thereby also
decreasing vehicular emissions.
Fracking,
vehicular emissions, coal - fueled electric energy plants, and others are all contributors to environmental pollution.
In the decades since, legislation and regulation of
vehicular emissions has tightened substantially.