PDF chapter test TRY NOW

Give very short answers to the following question:
 
1.Name the chemicals which are used in refrigerators and air conditioners and damage ozone layer when released in air.
 
Chlorofluorocarbons (CFCs) are chemical compounds made of , , and carbon elements used in refrigerators, air conditioners, and aerosol sprays. When released into the atmosphere, it damages the ozone layer.
 
2. Name any two sources which cause air pollution due to suspended particulate matter.
 
There are two sources of air pollution:
(i). Automobiles that run on  emit SPM, which hangs in the air and reduces visibility. They cause disease when inhaled.
(ii). manufacturing and mining generate SPM, which pollutes the atmosphere.