We see this more locally in the US as well. There's something called the California effect. California emission standards were more strict than the rest of the

We see this more locally in the US as well. There's something called the California effect. California emission standards were more strict than the rest of the country, but it didn't make sense to make California only vehicles and then vehicles for the rest of the country. So automakers built to the California standards and residents in all of the other states got to benefit from cleaner air as a result.