8. China established greenhouse gas observation network

In December 2021, China's meteorological authority announced that the country has basically established its first greenhouse gas observation network after nearly 40 years of construction.

The announcement came after the China Meteorological Administration released its first national greenhouse gas observation network directory, which consists of 60 high-precision observation stations covering key areas across the country.

Among the elements under observation are seven types of greenhouse gases specified in the Kyoto Protocol, including carbon dioxide, methane and nitrous oxide.