Something that was or still is living.It can also be part of a once living thing.
Something that was never living and never will be living.
Community, Population, Organism
An aquifer can help purify water so that way it is drinkable to humans.
An impermeable surface is when water can not soak into the ground.For example a parking lot or a sidewalk.
This can be caused if there are not enough trees or deep rooted plants by a river bank.Therefore dirt and sediment will runoff into the river and cause pollution.
This can carry heavy amounts of pollutants that can run into a river,lake or stream.These pollutants carried in the runoff can kill aquatic life and other organisms.Runoff can be kept from polluting these rivers,streams,and lakes if by impermeable surfaces,deep rooted plants were put around them and if people would be careful of what debris they put into the streets and down into the sewers.
Wetlands can help with pollution problems.For example since they have numerous plant life,those plants help clean the air.Also any runoff from a nearby town or city,the wetland's deep rooted plants would absorb the runoff therefore protecting anything else that could have been harmed if it came in contact with the polluted runoff., Urbanization, This can cause wetlands to be destroyed.
Point Source is when you can trace a pollutant back to its original source.
Non-point source is when you can not trace a pollutant back to its source.
This means that the resource can keep being supplied.
This means that the resource cannot be replaced.