A new report estimates that one in

A new report estimates that one in five people worldwide is breathing air, which is beyond internationally agreed safety limits for pollution. Still, the government refuses to set safe levels for some pollutants.
What is true according to the information given?
The government needs to launch an anti-air pollution campaingn.
20% of people worldwide have poor health due to air pollution.
The government can reduce air pollution levels by at least 20%.
20% of people worldwide are being slowly poisoned by polluted air.