World Leaders in Paris Agree to "Historic" Deal on Climate Change

A global climate pact lauded as a "historic turning point" was adopted Saturday by world leaders after two weeks of intensive talks. "This is a tremendous victory for all of our citizens," U.S. Secretary of State John Kerry said at the summit after the landmark agreement passed. "We have taken a critical step forward." The first-ever international accord, agreed to by nearly 200 nations, requires all countries to take steps to reduce greenhouse gas emissions. Leaders burst into cheers after it was passed, many hugging each other with tears in their eyes. To achieve that goal, the world has to stop emitting greenhouse gases altogether in the next half-century, according to scientists.