It’s enough to wipe the smile off her face. A pair of climate-change activists hurled pumpkin soup at the Mona Lisa on Sunday at the Louvre Museum in Paris as onlookers gasped, shocking new video shows. “What is more important?” the crazed activists shouted in French. “Art or the right to have a healthy and sustainable food system?” The two nuts are members of the activist group called “Riposte Alimetaire,” or Food Response, which issued a statement saying the stunt was meant to highlight the need to protect the environment.