The Mediterranean is the most polluted sea in the world, and some scientists are on a sailboat studying the problem by collecting plastic samples for analysis. For a few hundred euros, some excursions are open to the public, who get an opportunity to help the cause.

Sophie and Patrice discuss the pollution problem in Paris. Although efforts have been made to keep cars out of the city center, there's still much to improve. Cars still clog the freeways outside Paris.