France's top diplomat, who will preside over a year-end Paris summit tasked with inking a climate rescue pact, warned Sunday of looming planetary "catastrophe" if negotiations fail.
Foreign Minister Laurent Fabius's remarks came as separate reports warned of the devastating effects of global warming on the poor and those living in megacities around the world.
"It is life on our planet itself which is at stake," Fabius told journalists as ministers and climate envoys from 70 countries met for pre-summit talks to iron out tough political questions.
With the key UN conference just three weeks away, he also announced that Russia's President Vladimir Putin would attend the November 30 opening.
Russia, a major oil producer, is seen as a deal-maker or -breaker in the years-long attempt to negotiate the world's first truly universal pact to curb climate-altering greenhouse gas emissions.
"There is absolute urgency," said Fabius, to achieve the UN goal of limiting global warming to two degrees Celsius (3.6 degrees Fahrenheit) over pre-Industrial Revolution levels.
The UN's climate science panel has warned of an average temperature rise of "four, five, six degrees, if we do not act extremely quickly," he said.
"This would have catastrophic consequences because there would be drought... and colossal migration problems, including problems of war and peace."
PHOTO: Boys walk along the ruins of a house destroyed at the height of typhoon Haiyan at a coastal village in Tacloban City, central Philippines.
CREDIT: AFP Photo/Ted Aljibe.