Question

Question 4: As per national ambient air quality standards, the concentration of benzene in industrial area should be within micro gram/cubic metre 05 O 50 O 0.5 O 500​

Answer 1

According to the national ambient air quality standards in India, the concentration of benzene in industrial areas should be within 5 $\mu \mathrm{g} / \mathrm{m}^{3}$ annually

What are national ambient air quality standards?

National Ambient air quality standards provide the guidelines for the emission of certain pollutants in the air to avoid damage to the people and the ecosystem.

Historical background of  national ambient air quality standards

• National ambient air quality standards were first adopted in 1982 by the Central Pollution Control Board (CPCB).

• There are standards for around 8 parameters in national ambient air quality standards including benzene, PM2.5, PM10, SO2, CO, NH3, Ozone, and lead

• According to the standard, the concentration of benzene in the industrial zone should not exceed 5$\mu \mathrm{g} / \mathrm{m}^{3}$