Approximately 1.8 billion people worldwide last year experienced record-warm annual average and global temperature increases of 1.2 degrees Celsius above the 1850 to 1900 average, Berkeley Earth's report has found.
While 2021 was significantly colder than 2020, it was nominally the sixth-warmest year on Earth since 1850, according to the report published on Thursday.
On land, 2021 was nominally the fifth-warmest year observed, and effectively tied with 2015. This was significantly cooler than 2020, which was the warmest year on land.
According to the report, although 2021 was cooler than 2020, the long-term trend remains consistent with the ongoing pattern of global warming.
While the global average temperature did not set a new record in 2021, nonetheless 25 countries then experienced their warmest year on record.
Around 1.8 billion people live in these 25 countries; namely Bangladesh, Bahrain, Benin, Bhutan, Burkina Faso, China, Ghana, Guinea, Iran, Kuwait, Liberia, Malta, Myanmar, Nigeria, North Korea, Oman, Qatar, Saudi Arabia, Senegal, Sierra Leone, South Korea, Togo, Tunisia, Turkmenistan, and the United Arab Emirates.
The largest contributor to this record warmth came from over much of China.