Here are 60 humans and the space required to transport them by car, bus and bicycle:

http://imgur.com/mxGXuuR

People in prisons take even less space. Freedom is also is in the equation. A car gives me more choices than a bicycle. If there are too much cars (can happen), perhaps this city is becoming too big. Why live in crowded spaces, if there are many alternatives available?

i completely agree.

in the future we have less space per person as there are more people, and politically no-one really wants to talk about population growth or demographics (unless they want to encourage people to breed faster).

the car is obviously superior to the bicycle for the reasons you state, it is also obviously inferior in terms of environmental damage.

In dense urban area, such as Paris, car takes a lot of very precious space.

They also significantly reduce the life expectancy of the other humans in the city, directly (via accidents) or indirectly (via pollution)

It seems to be a good idea to try and limit car usage as much as possible, and doing that implies making other alternatives, such as bike, more practical and pleasant.

Again, this is speaking for dense urban area like Paris. Maybe things are different were you live.

Cars need much more space and emit much more…stuff (noise, particles, you-name-it) than any other form of transport.

Not if electrical (and also air transportation is the pollution champion – not that we should stop flying). As for space — space is a market product. If space is at premium, people should pay more, e.g., by paid car entrance into downtown.

you're nitpicking at the silly language used by the post. carry on.

also for humans: nitpicking at silly language, humour, reclaimed wood tables, mime, tax loss harvesting, cluster bombs, mirin, brown-coal-fueled power stations, group theory, punctuation, losing the main thread of conversation.

Now, guns are not made for kittens too, no?

Guns are good. I live in the most gun-happy country in Europe (Switzerland); no problems here.