Sean Penn says Paris climate talks "last great hope"

Hollywood star Sean Penn said Sunday the upcoming climate talks in Paris were the "last great chance" to stop the planet overheating. Penn, one of Hollywood's most socially engaged actors and directors, was in the French capital to meet Environment Minister Segolene Royal with less than a month to go until the 21st United Nations Climate Change Conference begins. He said, "Everybody is going to have to change in their daily life. If you love your children you have to make some changes or they will have a far lesser world than we've had. So that's simple and it's immediate."