[probably_wrong]

I agree with cars being the problem. I only thought about that when I learned that laws were drafted to force electric cars to make noise - for a brief couple of seconds I realised how different the world would be if all cars were silent... and then I got my hopes crushed.

I truly cannot picture what life would be like without car noise and light pollution.

[matthewheath]

In the UK at least, there's a good reason behind the law. Electric cars are required to make noise so that visually impaired people know a car is approaching.

[naravara]

They already make plenty of road noise just from the friction of the tires. If visually impaired people can't hear it, then it's likely because of all the OTHER sources of noise pollution around them.

[keiferski]

Check out the movie Gattaca for a vision of a future world with silent electric cars.

[brokenmachine]

Most of the noise from cars is from the tyres.