India, March 19 -- Global warming causing carbon dioxide (CO2) levels are now the highest that they have been in the last 8,00,000 years, according to the State of Climate 2024 report published by World Meteorological Organization (WMO) on March 19, 2025. WMO measured the CO2 levels at 420 parts per million in 2023.

Along with the record CO2 levels, other greenhouse gases (GHGs) such as methane (CH4) and nitrous oxide (N2O) were also at their highest levels in the past 8,00,000 years.

The record levels of GHGs have resulted in record breaking temperatures in 2024 along with natural variations such as El Nino in the early part of 2024. The global mean near surface temperature was 1.55 C above pre-industrial average, according to an analy...