vorpuni

Lead helped with the valves not getting as much wear because of specific metallurgy that depended on it. It wasn’t strictly needed, the change occured after cars were already mainstream.

Google has every incentive to break reCAPTCHA competitors and/or use botnets to spam anything not protected by reCAPTCHA.

But don’t worry social credit systems where you’re barred from public transport is so dystopian only the Chinese do it.

Eurovision did the same.

Metal contamination in food is a double edged sword as well: if you live in America it’s unlikely you’d ever need selenium supplementation, in Europe there’s basically none in the soil so it’s not impossible to be deficient.