Leaders back climate change urgency in New York

Heads of state and government on Monday kicked off "Climate Week," held every year on the margins of the UN General Assembly, by urging world leaders to act urgently to reduce global warming.

With Poland hosting the COP 24 climate summit in December, UN climate chief Patricia Espinosa called on nations to unite behind limiting global warming to the less than two degrees Celsius enshrined in the 2015 Paris accord.

"Nations are not living up to what they promised," she said, making no mention of the Trump administration's decision in June 2017 to pull out of the Paris agreement.

"What nations have currently pledged under Paris will bring the global temperature up about three degrees by 2100," she said.

Emergency climate talks in Bangkok earlier this month did not make sufficient progress, she said. "We must therefore work harder than ever between now and Cop 24 to complete this work."
"The problem with climate change is that it's about transforming the whole economy," said Brown. "The key part is technological investment and we need big company investment to get the technology."