rarefying वाक्य

The primary substance in the Universe comes from fire, passes through the stage of air, and then becomes water : the thicker portion becoming earth, and the thinner portion becoming air again, and then rarefying back into fire.
This is due to several negative factors : first, the massive use of agricultural pesticides such as DDT and other environmental poisons was extremely detrimental to the harriers themselves, as well as rarefying their prey, in particular large insects.