Re:Paris Will Create the City's Largest Gardens Around the E...
by flr03 on Thursday May 23, 2019 @05:22AM
(#19989968)
I was about to write the same thing. I lived in Paris and now in London. Often residential streets are disgusting and smelly because people just leave their trash bags there out in the street.
Talking about stones, you can easily see the dark layer of pollution on bricks as well.
Talking about the Loire valley, I lived in Tours also and It's true that this is very difficult to clean, if I'm correct the best technique is to use a laser but it's slow and expensive.
The stones being dirty is another issue. A lot of white stone will get darken by car pollution really quickly and cleaning those is a never ending process until fossil fuel is completely banned. The speed at which the the stone will get dirty as the the price of cleaning it wihtout damaging it differs a lot depending on the type of stone. I know that around the Loire valley, cleaning tuffeau is a huge pain.