RELATED'Many proposals have been made to mitigate global warming, but without a rapid decrease of CO2 emissions from fossil fuels they are pretty much futile,' Pieter Tans, senior scientist with NOAA's global monitoring division,.Carbon dioxide is the most abundant greenhouse gas, but the levels of other planet-warming gases like methane are also rising. NOAA tracks many of them.Earlier this year, that the Annual Greenhouse Gas Index - a measure of greenhouse gas emissions and their impact on the the atmosphere's heat-trapping capacity - rose to a value of 1.43.
During the month of May, CO2 at one location reached startling levels that haven't been present on Earth in millions of years. This news comes after CO2 levels increased at a record rate in 2018.