Question

how many industries actually have airpurfier system​

Answer 1

Explanation:

Last month, the New York Times’ former South Asia correspondent, Gardiner Harris, wrote a column describing the impact of Delhi’s polluted air on his eight-year-old son’s health. “Delhi, we discovered, is quietly suffering from a dire pediatric respiratory crisis…” he wrote, wondering if foreigners and rich Indian should continue living in India’s polluted capital.

But not everyone can just pack up and migrate to less polluted cities. So, a growing number of rich and middle-class residents are now in search for alternative solutions—and among the most popular are expensive air purifiers.