10 years after the UN climate pact, what did it actually do?

Environmental activists form a human chain representing the peace sign and spelling out "100% renewable," on the side lines of the COP21 UN climate summit in Paris on Dec. 6, 2015. The landmark Paris Agreement was signed days later. (Michel Euler/The Associated Press)

In 2015, nearly 200 countries adopted the Paris Agreement, the first global pact to fight climate change . It was a commitment to keep global warming "well below" 2 C compared to pre-industrial times, while striving to limit it to 1.5 C .

Ten years later, those same countries will meet in Belem, Brazil, from Nov. 10 to 21 for this year's annual United Nations climate summit, COP30.

Over the past decade, both atmospheric levels of greenhouse gases that cause climate change and global temperatures have con