DemDebate Secret Video - What The U.S. Promised in Paris

The video, created by Minute Earth for NBC News and YouTube, was intended to provide context during the Democratic Presidential debate on January 17th, 2016. It discusses the history and current impact of climate change, highlighting the 1990 warning about heat-trapping gases and the visible effects seen today. The video also covers the Paris Agreement, where 196 countries pledged to combat climate change, and emphasizes the need for stronger commitments, particularly from the US, to meet its emission reduction goals.

What is necessary for the Paris pact to be effective according to the text?

What commitment did the US make in relation to emissions?