Visar inlägg med etikett Black Crust. Visa alla inlägg
Visar inlägg med etikett Black Crust. Visa alla inlägg

27 maj 2016

Black crust....


..was a common view in the cities of Europe due to the combustion of fossil fuels. Today the air quality is so much better that buildings and statues covered with a black crust are a rarity.