A group of 12-year-old friends concerned about climate change proposes a new way to save the earth: amending the U.S. Constitution. Their project propels these activists on an amazing journey across America--and all the way to Norway--with plenty of outside-the-box hijinks and civil disobedience, as they work to save the planet and their futures on it. For sixth grader Sam Warren and his friends Catalina, Alistair, Jaesang,...