How does lead get into water?
a-it is released into waterways with industrial waste
b-it is a byproduct of detergents interacting with organic matter
c-it occurs naturally in water
d-it leaches into water as old pipes corrode

which part of the government has authority to enforce the clean water act?
a-president
b-congress
c-the environmental protection agency
d-u. s. forest services

which of the following water supplies would be affected directly by groundwater contamination?
a-wells
b-lakes
c-streams
d-rivers

what role do bacteria play in an aquaponics system?
a-they transform fish waste into food
b-they enrich the water to fish grow
c- they break down dead plant matter
d-they warn that the fish are sick