KATOWICE, Poland — The head of the U.N.’s top science panel on climate change said Tuesday that the world needs to “do more and faster” to prevent global warming on a scale that would cause irreversible environmental damage and hit poor societies hard.
Hoesung Lee, chairman of the Intergovernmental Panel on Climate Change, told diplomats at the U.N. climate summit in Poland that scientists had conducted an exhaustive review of data for their recent special report on keeping average global temperature increases to 2.7 Fahrenheit.
“The report shows that not just action, but urgent action is needed,” Lee said.
His comments come as national leaders and ministers gathered in Katowice for the final stretch of the two-week talks, with just days left to break through thorny issues that diplomats have struggled to resolve.
U.N. climate chief Patricia Espinosa urged delegates to show a “spirit of unity” through the end of the week.
The calls were echoed in speeches by the ministers as they took the floor on the first day of their plenary session. They urged all participants to show more ambition in setting national goals for the year 2020, and beyond. Coming from around the globe, they detailed the steps and financial contributions their governments are making to the cause of fighting climate change. They all stressed the urgency of the situation and the need for a joint approach.
Scientists say emissions of greenhouses gases such as carbon dioxide — which is produced through burning of fossil fuels — need to drop significantly by 2030 and reach near-zero by the middle of the century if the 2015 Paris accord’s most ambitious goal is to be achieved.
“We are moving in the right direction in many areas, but we need to do more and faster,” said Lee, adding that cutting emissions sooner would give the world more room to maneuver later.
“Doing more now reduces reliance on unproven and risky techniques to remove carbon dioxide from the atmosphere,” he said. “Doing less now would commit people today to the known risks of overshooting [2.7 F], with severe risks of irreversible loss of ecosystems and shocks to the basic needs of the most fragile human societies.”
Negotiators have until Friday to finalize the rules of the Paris accord.