Mayors and governors from major cities around the world signed a declaration at the Vatican urging global leaders to take bold action at a landmark summit in Paris this year on global warming.
At a conference in the Vatican Tuesday, Pope Francis urged the United Nations to take a “very strong stand” on climate change, saying it may be the last chance to tackle human-induced global warming, Reuters reported.
Last month, the pope issued an encyclical on climate change, the first ever dedicated to the environment.
The call to his church’s 1.2 billion members could spur the world’s Catholics to lobby policymakers on ecology issues and climate change.
The Vatican conference linked climate change and modern slavery because, according to an introductory paper, “global warming is one of the causes of poverty and forced migration”.
Francis, speaking in unprepared comments in Spanish to the group at the end of the first day, said he hoped the summit in Paris would address “particularly how it [climate change] affects the trafficking of people”.
The conference is the Vatican’s latest attempt to influence the Paris summit in December, the purpose of which is to reach a global agreement to combat climate change after past failures.
Mayors from South America, Africa, the United States, Europe and Asia signed a declaration stating that the Paris summit “may be the last effective opportunity to negotiate arrangements that keep human-induced warming below 2 degrees centigrade”.
Leaders should come to a “bold agreement that confines global warming to a limit safe for humanity while protecting the poor and the vulnerable …” the declaration, which the pope also signed, reads.
High-income countries should help finance the cost of climate-change mitigation in low-income countries, it says.
In a rejection of climate-change deniers, the declaration says: “Human-induced climate change is a scientific reality, and its effective control is a moral imperative for humanity.”
On Tuesday, California Governor Edmund “Jerry” Brown, whose state is suffering a severe drought, urged the mayors to “fight the propaganda” of big business interests that deny that climate change is human induced.
“We have fierce opposition and blind inertia, and that opposition is well-financed,” Brown said.
New York Mayor Bill de Blasio called Pope Francis “the most powerful voice on this earth for those whose voice is not being heard”.
De Blasio announced that New York City would commit to reduce carbon emissions by 40 percent by 2030 on top of a previous commitment to reduced them by 80 percent by 2050.
Tony Chammany, the mayor of Kochi, India, said coastal areas were already feeling the effects of rising sea levels.
“It is now or never; there may never be a replay,” he said.
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