Editor's note: FYI is an ongoing series of feature stories by Cronkite News digital production bureau students that help explain various issues that impact the Valley.
TUCSON – Look up at the sky once the sun goes down. How many stars do you see?
Arizona environmental experts attending the United Nations Conference on Climate Change in Paris are expecting a substantial agreement to reduce global warming. And they hope it’s just the beginning of a worldwide commitment to save the planet before it’s too late.