Dozens of mayors from around the world are traveling to Vatican City in Rome, Italy to sign off on a Vatican declaration urging national leaders to take an official stand against climate change, reported CBS News.

Sixty mayors will attend a two-day climate conference with Pope Francis to discuss the problem of climate change. The final declaration to be signed by the mayors states that “human-induced climate change is a scientific reality and its effective control is a moral imperative for humanity.” It’s a stark reflection of the pope’s climate change encyclical.

The declaration also calls for financial incentives to companies that transition to low-carbon and renewable energy sources. With international climate negotiations occurring in Paris in December, the declaration urges world leaders to approve a “bold climate agreement that confines global warming to a limit safe for humanity, while protecting the poor and the vulnerable from ongoing climate change that gravely endangers their lives.”

Pope Francis has led the international campaign against climate change. This conference in Vatican City is another way to bring climate change to the international stage for serious consideration and planning.