- The 2015 Paris Climate Conference will be a meeting of the 195 nations that make up the United Nations Framework on Climate Change
- It aims to set a legally binding pact to keep global warming below what most scientists say is a critical threshold
- It's critical that attendees reach an agreement to enable long-term change beyond 2020
(CNN)Today marks one month until world leaders converge in Paris for COP21, also known as the 2015 Paris Climate Conference. Here are five things you should know as we head toward this critical event.