"A recent New Zealand study found that the risks of death from second hand smoke is between the risk of getting melanoma and dying in a car crash.
Interesting that you picked the NZ study and not one from somewhere else because here Melanoma and car accidents are both big killers due to us having far stronger sun, very low levels of ozone meaning we have the highest incidence of melanoma in the world: http://www.stuff.co.nz/nationa...
Also, the driving standards here are terrible as are the roads, and there's a lot of old cars still in use with the average age of cars being 14+ years meaning they lack a lot of the modern safety features and given that's an average, there are plenty of cars that are 30+ years old still running around. We have a very high accident rate and many deaths on the roads as a result of poor driving and old vehicles.
Put those together and then consider that smoking sits in between them and then think, how safe is smoking? It is already illegal to smoke in a car with children and there's a push for the country to be completely smoke free by 2025 because that's at least something that can be done to improve health as we can't fix the ozone layer, turn off the sun, or train drivers to not be crap behind the wheel apparently.
As for pollution, NZ is 85% renewable energy so that's nice, but transport makes up a lot of our pollution and the air in cities like Auckland is very poor at some times of the year due to traffic fumes along with a large amount of wood burners. There's very little support to move to EVs (I have one) or to encourage no-polluting heating (I have heatpumps) and there are even efforts to penalise those who generate their own electricity (I have solar) so it is pretty poor in the face of the whole clean green New Zealand image.