Question

Fill in the blanks.
1. Air contains 0.03% of
and it is normally not considered a pollutant.
2. Smog causes diseases such as
and
3. Power plants use water and then return the hot water into the water bodies. This is
called
1.
is the method in which the water passes through layers of gravel,
sand and charcoal.​

Answer 1

1% other hasaa in air mark me as brainlist

Answer 2

Answer:

other gases

emphysema, bronchitis