Questions › Category: Civil Engineering › Concentration of ozone in clean air is 0 Vote Up Vote Down VideRime Staff asked 5 years ago Concentration of ozone in clean air is a) 0.5 ppm b) 0.1 ppm c) 0.001 ppm d) 0.01 ppm Environmental Engineering Part 3 Share this Now with Friends: Share on WhatsApp (Opens in new window) WhatsApp Share on Telegram (Opens in new window) Telegram More Related