In vetoing a bill (S2946) that would have required New Jersey to stay in a regional program intended to curb greenhouse gases — a program Christie plans to leave by the end of the year — the governor said “climate change is real.”

He added that “human activity plays a role in these changes” and that climate change is “impacting our state.”…

Christie’s come full circle on the issue. Last year, he told a town hall audience in Toms River he was skeptical climate change is the result of human activity. He backed off those comments at a conference of environmentalists in May and agreed to meet with climate scientists for a lesson in global warming.