Greenhouse gas concentrations hit a record last year and the world is "way off track" in capping rising temperatures, the United Nations said.
A report by the U.N. World Meteorological Organization (WMO) showed carbon dioxide levels surged to 413.2 parts per million in 2020, rising more than the average rate over the last decade despite a temporary dip in emissions during COVID-19 lockdowns.
WMO Secretary-General Petteri Taalas said the current rate of increase in heat-trapping gases would result in temperature rises "far in excess" of the 2015 Paris Agreement target of 1.5 degrees Celsius above the pre-industrial average this century.
"We are way off track," he said. "We need to revisit our industrial, energy and transport systems and whole way of life," he added, calling for a "dramatic increase" in commitments.
Under countries' current pledges, global emissions would be 16% higher in 2030 than they were in 2010, according to a separate analysis by the UN Framework Convention on Climate Change (UNFCCC).
That is far off the 45% reduction by 2030 that scientists say is needed to cap warming at 1.5 degrees and avoid its most devastating impacts. A "business-as-usual" trajectory leading to temperature rises of 1.6C, 2.4C and 4.4C by 2030, 2050 and 2100 respectively would result in 2.4% lost output by 2030, 10% by 2050 and 18% by 2100, according to the median replies to the survey.