The level of carbon dioxide trapped in the atmosphere and contributing to climate change, along with methane and nitrous oxide, hit a new record in 2017, the UN’s World Meteorological Organization said in a new report.
These three greenhouse gases, the main causes of climate change, are all increasing and there is no sign of the trend reversing, the WMO said. As a result, more sea level rises, ocean acidification, and extreme weather can be expected.
“The last time the Earth experienced a comparable concentration of CO2 was 3-5 million years ago, when the temperature was 2-3 ºC warmer and sea level was 10-20 meters higher than now,” said Petteri Taalas, secretary-general of the WMO.
The amount of CO2 in the atmosphere rose to a record of 405.5 parts per million last year, up from 403.3ppm the previous year, and 400ppm in 2015, the report published today said. Between