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New Delhi: An industry of anti-pollution products has grown amid rising pollution level. As the air quality index (AQI) moved close to 400 (suggesting severe pollution) in Delhi, some startups made it a good business opportunity by inventing various anti-pollution devices other than masks and air purifiers to give relief to citizens.

According to a report in the Times of India, Delhi-based startup Nanoclean Global has developed nostril filters using a special cellulose-based fibre which can trap microscopic pollutants like PM 2.5 and 10. Known as Nasofilters, each pair costs Rs 10 and can be worn for 10-12 hours daily, Jatin Kewlani, COO, Nanoclean Global told ToI.

From small bags of activated charcoal that clean up indoor air to bigger outdoor devices, startups are developing many anti-pollution devices.

According to the ToI report, Bengaluru-based startup Devic Earth has developed a device, Pure Skies, which uses radio waves to scatter pollutants like PM 2.5 and 10, nitrogen oxide and sulphur dioxide. This device emits waves that scatter pollutants and clean up the air over an area, Devic Earth CEO Dr Srikanth Sola told the publication.

This device, which claims to improve air quality index by 33 per cent, is available in two variants, one for indoors and the other for outdoors. According to the report, Delhi government used this device to control air quality during the Delhi Half Marathon in October.

BreathFresh, another startup in Delhi, has developed an air-purifying bag called Vayu Natural which contains activated charcoal and absorbs indoor pollutants and allergens. The bag can last up to six months and then be recharged by letting it sit in the sun for an hour, the ToI report said adding that BreatheFresh has sold 30,000 units of its air-purifying bags in the past one and a half years. This bag costs between Rs 450 to Rs 1,000.

Gurugram-based Bonphul Air Products has expanded its range of purifiers to include oxygen optimisers which improve oxygen content in the air to the desired level. These oxygen optimisers cost between Rs 22,000 to Rs 40,000, according to the ToI report.