China has also been ... Russia's invasion of Ukraine. This chart shows the countries with the largest post-pandemic decreases in annual average PM2.5 particle air pollution (in μg/m³).

SEE ALSO: Beijing welcomed 2017 from beneath a blanket of smog The AQI, which is used by China to measure air pollution, is officially limited at 500. An AQI of 500 for a 24-hour period triggers a ...

The “America First” trade agenda has consistently sought to restore fairness to America’s economic relationships, ...