EU or Non-EU?

I try to avoid politics wherever possible (it's hardly based on Science and I don't really understand it) but there is an interesting study from the Dutch on the impact of EU environmental laws. They basically did a study where they attempted to contrast what would have happened to their country's environment with and without the EU regulations on environmental standards (https://www.theguardian.com/environment/2020/jan/30/pollutionwatch-where-would-we-be-without-eu-environmental-laws). In essence, without the agreed legislation, they believe that levels of particulates in the air of their cities would now be similar to those in China and India with a resulting reduction in life expectancy. There would also have been more damage from acid rain as well as dirtier water courses and beaches. Of course, without the EU, The Netherlands might well have strengthened its environmental protections over this period but a) it's easier to do when it's agreed conjointly and b) acid rain, 'greenhouse gases', particulates and pesticides are no respecters of borders.