Gases in ambient air are measured in various units. Like ppm, ppb, percentages, microgtam per cubic meter etc. What are these exactly? I am new to the air field. earlier I worked with soil and water where such type of confusion were not present. Please help me to understand in a lucid manner.
Thank you
Regards
Dr. Satish Bhagwatrao Aher
Scientist B
Air monitoring and Exposure Assessment laboratory
ICMR-NIREH, Bhopal, INDIA