Complete the following sentences with appropriate words :
Rain that is more acidic than normal is called .........
The release of hot water into rivers causes Water ........
Sewage is the source of ........ pollution.
Drinking polluted water causes **** like ........ and .........
Noise pollution causes Hearing impairment and ..........
......... is manmade compounds that have been widely used as refrigerants and in spray propellants and foam blowing.