published on 25 November 2019 in air

Greenhouse Gas Bulletin: the concentration of greenhouse gases continues to increase

Once again in 2018, an increase has been recorded in the concentrations of the various greenhouse gases. This was stated in the Greenhouse Gas Bulletin, the annual report by the World Meteorological Organization (WMO), made public this morning: this relentless growth means that future generations will have to cope with increasingly more severe impacts of climate change, including rising temperatures, increasingly more extreme weather conditions, water stress, rising sea levels and destruction of marine and land ecosystems.

According to the Bulletin, the concentration of carbon dioxide in the atmosphere reached 407.8 parts per million (ppm) in 2018, against 405.5 ppm in 2017 and almost 50% more than the pre-industrial level. Not only the concentration in the atmosphere is increasing, but also the rate of growth of CO2 emissions, which has continued to accelerate from 1985 to date. Methane, the second most important greenhouse gas, which contributes around 17% of the anthropic greenhouse effect, has reach a new record value of about 1869 parts per billion (ppb). Nitrous oxide, which also plays a role in the depletion of the stratospheric ozone layer, reached a level of 331.1 (ppb).

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