Tinted windows may reduce incidence of skin cancer, but they are dangerous for pedestrians and cyclists because you can't tell if the driver is looking in your direction. If, for example, you are walking westbound on the sidewalk of a major boulevard on the south side of the boulevard and you need to cross a minor street at which a car with tinted windows is trying to make a right turn onto the boulevard, you need to be very careful!

What is going on with this article? It contradicts itself all over the place.

> All glass used in house, office and car windows completely blocks UVB from passing through.

But only laminated glass can completely block UVA. UVA can pass through other glass used in car, house and office windows and cause skin damage, increasing the risk of cancer.

Car windscreens block UVA, but the side and rear windows don’t

A car’s front windscreen lets in lots of sunshine and light. Luckily it blocks 98% of UVA radiation because it is made of two layers of laminated glass.

I haven’t read the article. UVA and uvb are hardly blocked by pure glass. You can get films which let in almost all light and block almost all uv. 3M has a range.