Countries must make an unprecedented effort to cut their levels of greenhouse gases in the next decade to avoid climate chaos, the UN has warned, as it emerged that emissions hit a new high last year.
Carbon dioxide emissions in 2018, also accounting for deforestation, rose to more than 55 gigatonnes, and have risen on average by 1.5% a year for the past decade, according to the UN Environment Programme (UNEP) annual emissions gap report.
Global emissions must fall by 7.6% every year from now until 2030 to stay within the 1.5C ceiling on temperature rises that scientists say is necessary to avoid disastrous consequences. The only time in recent history when emissions have fallen in any country at a similar rate came during the collapse of the Soviet Union. During the financial crisis and recession, emissions in the US and Japan fell briefly by about 6% but soon rebounded.