There are several factors that made 2023 the warmest year on record, but by far the biggest factor was the ever-increasing amount of greenhouse gases in the atmosphere that trap heat, Burgess said. Those gases come from the burning of coal, oil and natural gas.
Earth shattered global annual heat records last year and it's flirting with the warming threshold that nations wanted to stay within to avoid the worst consequences of climate change. That's according to Copernicus, the European climate agency, which reported Tuesday that 2023 was 1.48 degrees Celsius (2.66 degrees Fahrenheit) above pre-industrial times. That's just a whisker below the 1.5-degree threshold nations agreed to try to stay within at the Paris climate talks in 2015. And Copernicus said this January is on track to be so warm that the world will go past that 1.5-degree threshold for the first time over a 12-month period. Climate scientists say it's imperative that humans continue trying to hold down warming.
Earth last year shattered global annual heat records, flirted with the world’s agreed-upon warming threshold and showed more signs of a feverish planet, the European climate agency said Tuesday.