World Meteorological Organization Interim Statement on the State of the Climate 2019

According to the World Meteorological Organization (WMO), the year 2019 concludes a decade of exceptional global heat, ice retreat and record sea levels driven by GHGs from human activities. The global average temperature in 2019 (January to October) was about 1.1°C above the pre-industrial period and carbon dioxide concentrations in the atmosphere reached a record level of 407.8 parts per million in 2018 and continued to rise in 2019 . Seawater is 26 percent more acidic than it was at the start of the industrial age, and vital marine ecosystems are being degraded.