Whenever a component of climate change to the amount of gas, dust, odor, smoke, vapor, soot, steam and radioactivity in the atmosphere, too. We call such conditions as "bad air" or "air pollution".
Whenever a component of the air changing quantity of dust, gas, smell, หมอกค days, steam, steam soot and radioactivity in the atmosphere too. We call such conditions. "Air" or "air pollution".