Why is that smoke yellow?

Perché quel fumo è giallo? / Why Is That Smoke Yellow? is a collaborative work by Joachim Brohm and Valentina Seidel. It is an hommage to Michelangelo Antonioni's movie Il deserto rosso. All photographs were taken in and around the city of Ravenna in 2014-15, where the movie was shot in 1963-64.