Excessive richness of nutrients in a lake or
other body of water, frequently due to runoff
from the land, which causes dense growth of
algae and death of other organism from lack of
oxygen.
Particular type of matter that can be touched,
not just seen, heard, or imagined.
To make liquid flow away from its source.
To increase greatly in number, usually rapidly.
Substances, like smoke, sound that can pollute.
To increase (slowly over time) in quantity or
number.
To give or send out liquid.
An amount of substance in a liquid or in
another substance, or an ability to stay
focused.