A thick layer of smog overshadowed China’s capital city, Beijing, forcing authorities to temporarily suspend some highways and issue a pollution alert. Visibility in parts of Beijing dropped to less than 200 metres on Friday as heavy pollution engulfed the capital city on Thursday.

China: Beijing's increase in pollution raises alarm before Winter Olympics

US President Donald Trump speaking at the Economic Club in New York on Tuesday said that countries like "China, India and Russia are doing absolutely nothing to clean up their smokestacks and clean up all of their plants and all of the garbage that they're dropping in the sea floats into Los Angeles".

Garbage dropped by China, India and Russia into the sea floats into Los Angeles: Trump

US President Donald Trump who was on a three-day state visit to UK told a British television channel that the United States right now is among countries with the "cleanest climate" while taking a dig at India, China and Russia claiming that they do not have "very good air, not very good water in the sense of pollution and cleanliness.

China, India, Russia do not have very good air, they are not very good with pollution and cleanliness: Trump

China's air quality improved substantially last year, the environment ministry said Monday, following a government crackdown on pollution and a weakening economy.

China says air pollution dropped in 2018

Three cities in China's northern province of Hebei have issued second-level or 'orange' pollution alerts, a state-backed newspaper reported on Wednesday, forcing industrial plants to cut output.

Three cities in industrial Chinese province of Hebei issue pollution alerts

The tower has been built in Xian in Shaanxi, a northwestern Chinese province The tower has been built in Xian in Shaanxi, a northwestern Chinese province

China builds 'world's biggest air purifier', said to be working effectively