The winter view

I'm still not sure how laundry gets dry in the winter...outside...when it's raining most of the time...

And, here we have a lovely picture of...wait for it...coal smoke.

The proof lies with this picture. Amazingly enough, there is great ventilation in the modern apartments that use coal, so the smoke simply exits through the chimneys. So, as long as you stay in your apartment, the air is fairly clean. Just don't open a window!