दिल्ली वासी ने मात्र 1900 रुपये में बनाया स्वयं का एयर प्यूरीफायर, 15 मिनट में AQI को 400 से घटाकर 50 कर दिया
Delhi resident made his own air purifier for just Rs 1900, reduced AQI from 400 to 50 in 15 minutes
Delhi resident made his own air purifier for just Rs 1900, reduced AQI from 400 to 50 in 15 minutes