With the Paris Agreement on climate change poised to take effect, diplomats now head to Morocco to hammer out the difficult details of how to make it work and raise the $100 billion needed each year to meet its ambitious goals.

Morocco's Foreign Minister Salaheddine Mezouar said he expects to announce that countries accounting for over 55 percent of the world's greenhouse gas emissions have formally joined the treaty — the threshold needed to trigger the landmark agreement — when he presides over the 22nd U.N. Climate Conference in Marrakech that starts on Nov. 7.

"Once the treaty takes effect, the next steps will require concrete actions on the part of world governments to start implementing concrete policies in order to adapt," said Mezouar.