and optionally or later diesel cars) 

in the hearts of cities, mainly because it improves the air-quality and the government could increase the price for combustion engine cars or increase the tax for having them in possession.

They could also make it easier to use eco-friendly transportation.
We could make it easier to recycle and stop being producers and consumers of disposable plastics.
Increase the "pant" that you get for recycling bottles and promote smarter and more energy efficient ways of transportation.
Regarding the problem with fashion producing a large carbon footprint,  just introduce a relatively high fee for introducing new clothes for clothing stores. and increase the use of nature friendly import/export practices.
another thing'd be to add parks to the insides of cities to have even more pure air than just without gasoline cars.
Holy shit this is a long thing..


There's been research done on overfishing which suggests that fishermen should catch roughly half of the fish in the sea, so that the next year, they'll be back at the numbers of the last year, and they can fish some more.