This is a lung?

Back in autumn when all the trees lost their leaves, two of the trees in Place Neuve had some seriously ugly white netting wrapped around them. A few weeks later, a banner reading "Ceci est un poumon" was put up on the netting around one of the trees.

Now, let's think about this logically. First of all, a tree is not a lung. It is a tree. Furthermore, a lung and a tree do not perform the same function. A lung takes in oxygen and releases carbon dioxide. A tree takes in carbon dioxide and releases oxygen. So they cancel each other out.

I ought to cover up the "This is a lung" banner with one of my own... "Ceci est l'anti-poumon".