The United Nation intergovernmental Panel on Climate Change said in a major report that human activity was changing the climate in unprecedented and sometimes irreversible ways.
The head of the United Nations, Secretary General António Guterres, said the report “is a code red for humanity”.
But scientists say a catastrophe can be avoided if the world acts fast.
There is hope that deep cuts in emissions of greenhouse gases could stabilise rising temperatures.
Echoing the scientists’ findings, UN Secretary General António Guterres said: “If we combine forces now, we can avert climate catastrophe. But, as today’s report makes clear, there is no time for delay and no room for excuses. I count on government leaders and all stakeholders to ensure COP26 is a success.”
The sober assessment of our planet’s future has been delivered by the UN’s Intergovernmental Panel on Climate Change (IPCC), a group of scientists whose findings are endorsed by the world’s governments.
Their report is the first major review of the science of climate change since 2013. Its release comes less than three months before a key climate summit in Glasgow known as COP26.
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