The increasing trend of greenhouse gas (GHG) emissions continued in 2021, according to the latest GHG bulletin released by the World Meteorological Organisation (WMO). All three major GHGs — carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) — recorded an increase in concentration in 2020 compared to previous years. Carbon dioxide levels at the Mauna Loa station in Hawaii, United States, and the Cape Grim station, Australia were 416.96 parts per million (ppm) and 412.1 ppm respectively in July 2021. This increase in GHG is despite the global economic shutdowns caused by the COVID-19 pandemic for the past two years.
— source downtoearth.org.in | 27 Oct 2021
people may be used more energy, food and private travel.