Dirty car? That'll be fine.

[#1]

In Nanjing (China) drivers will be fined if their car is dirty.  Don't let the UK Local Councils hear about this or it will be their next money raising scheme.

[#2]

No idea what Nanjing is like but some of the large cities in China have so much smog it would be impossible to keep a car clean, unless it was kept in a garage 24/7.

[#3]

Not forgetting the cost of water.
The last time I was on holiday in Cornwall the car park next to a stream was very busy. With locals and holiday makers.
All washing their cars.

[#4]

Hope there were no sheep or cows in the fields upstream.

[#5]

Most of the cars would still have looked cleaner.