"Earth Scientists Pin Climate Change Squarely On 'Humanity'"
"The weather is one of those topics that is fairly easy for people to agree on. Climate, however, is something else. Most of the scientists who study the Earth say our climate is changing and humans are part of what's making that happen. But to a lot of nonscientists it's still murky. This week, two of the nation's most venerable scientific institutions tried to explain it better."