clean air

The Southern Ocean has clean air with very little aerosols - microscopic particles of matter that form naturally or as a result of human activity.

Scientists believe they have identified the region with the cleanest air quality in the world, free of dust particles caused by human activity.

British scientists have just studied the new harmless toxic technology that can be carried out in disease rooms and 24/24 isolation rooms.

The Cordis Hotel in Shanghai has been crowded in recent years, all thanks to the hotel's high quality air filtration system.

Air pollution causes more than 3 million people to die prematurely each year, threatening almost all major city residents in developing countries.

American scientists ranked Seychelles as the world's most clean air country in 2016 based on the Environmental Management Competency Index (EPI).

In China, people have to use clean air tanks and even large canon guns to remove dirt.

More than 400,000 officials in many provinces have participated in the scale mission to cut down on dust and smoke, ensuring Beijing has a clean atmosphere for the APEC Summit

The wave of protests in Hong Kong over the past few days has caused no trouble for travel, but the blockade of many roads in crowded areas has made the sky more clear.

On September 12, the Chinese government announced a plan to reduce the country's air pollution level with various measures.