Well over 100 countries sign Paris climate deal

World leaders are gathered at the United Nations Headquarters in New York to sign a global climate change accord.

UN Secretary-General Ban Ki-moon said at least 171 countries are signing the deal, which was negotiated in Paris last December.

The accord’s central goal is to keep global temperatures from rising more than 2 degrees Celsius above pre-industrial levels.

The agreement will enter into force after 55 countries — representing 55 percent of global emissions — formally ratify it.

Many analysts are optimistic that could happen before 20-20, the date originally planned.