The Arctic and northern Siberia saw the largest temperature surges in 2020, and Europe had its hottest year ever as global carbon emissions continued to rise.
Trump Cabinet members Betsy DeVos and Elaine Chao cited the riot at the Capitol, which aimed to stop Joe Biden's confirmation as president, for why they quit.
Stock index giants MSCI and FTSE Russell said they would remove three Chinese telecommunications giants' Hong Kong-traded shares from widely followed indexes.
Emerging markets proved resilient in 2020 despite the coronavirus pandemic, recouping the losses from March's crash to end the year in positive territory.
The U.S. has had tense relationships with the two authoritarian states, which some experts said are challenging American leadership on the global stage.
Baidu will create a standalone electric vehicle company with Chinese automaker Geely as a minority shareholder. Geely will be responsible for manufacturing.
Following Wednesday's riot on Capitol Hill, there have been growing calls to remove President Donald Trump from office before his term ends on Jan. 20.