China bought out all stocks of bottled Rocky Mountains air from a Canadian company which indicates an alarming air pollution in the world's most populous country.

Vitality Air, a company who initially sold bottles of fresh air from the Rocky Mountains as a joke, was founded a year ago but only began selling to China since October. Within 4 days, supplies of the clean mountain air of about 500 containers were sold out says co-founder Moses Lam. Another set of 4,000 pieces of air bottles has been purchased and is on its way to the polluted country.

Each can contains 7.7 litres of fresh air and costs 100 yuan or 10 pounds which costs roughly 50 times more than a regular bottle of mineral water.

Most of the purchasers of the air cans come from Northeastern and Southern cities of China where pollution have reached critical levels.

Xinhua, a Chinese news agency, posted a photo online of the city under the thick smog last December 15 with the caption 'Heavy #smog hit China, again! This time in Shanghai as PM 2.5 hit over 300 Tuesday morning'

Last week before the photo was taken and uploaded on the internet, Beijing announced air pollution red alert where 50% of the Chinese had to pull their cars of the road to minimize smog and schools were forcibly closed.

Lam admitted that he started out selling bottled air as a joke. Vitality Air's co-founder Troy Paquette sold a plastic bag of air for 50 pence in eBay and another for 105 pounds. This is when they realised that there actually is a demand for fresh air. With China being their biggest market yet, the company has sold bottled oxygen to other countries such as India, Middle East and North America.

Harrison Wang, Vitality Air's representative in the China outlet, shared that most of their consumers are wealthy women who purchased the oxygen products to be given as gifts for their families.