I don't know about the UK but fluoride is not used in Continental Europe (afaik only the US fluorinates its water but maybe the UK too). Chloride yes, on balance it's far better to have chloride than bacteria which would otherwise develop in the pipes ...

Continental Europe food is much, much healthier than american food. Specifically, I contest your "95% loaded with added sugars" - that is probably true for the US (even the milk there tasted as if it had been loaded with corn syrup) but I am ready to bet it is not true for Europe, certainly not for Germany. Might depend what supermarkets you go to, some of them might have lower quality food than others but generally I found "too much salt" to be more of a problem (when buying downmarket food) than "too much sugar".

Air pollution has dropped dramatically in the past decades and continues to drop. Things are resolutely looking up on this side.

In the end I think it's a question of choice: choosing to see the glass half-full or half-empty :-)

Steem on!