Which of these ideas did you include in your answer?
Check all that apply.
A virtual watershed was used to model and observe
the flow of point and nonpoint pollution through the
watershed and the effect of environmental changes
on living and nonliving things.
If an environmental change affects abiotic factors, it
will also affect the biotic factors in an ecosystem
because these factors are closely linked.
Human activity can have a negative impact on an
ecosystem.