The report by the World Meteorological Organization (WMO), an entity linked to the United Nations (UN), shows that the The concentration of the main greenhouse gases (GHG) in the atmosphere reached a record high in 2018. According to researchers, last year, carbon dioxide (CO2) had a concentration of 407.8 parts per million (ppm). The level is 147% higher than the pre-industrial level of 1750.
“It is worth remembering that the last time Earth recorded a comparable CO2 concentration was between 3 and 5 million years ago. At that time, temperatures were 2 to 3°C warmer and sea levels were 10 to 20 metres higher than today,” WMO Secretary-General Petteri Taalas said in a statement.
