What is not considered a major problem for U.S.public parks today?
A) introduction of nonnative species
B) killing of native species
C) polluted air
D) agricultural runoff
E) deferred repairs of infrastructure

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The Answer of What is not considered a major problem for U.S.public parks today?
A) introduction of nonnative species
B) killing of native species
C) polluted air
D) agricultural runoff
E) deferred repairs of infrastructure

What Is Not Considered a Major Problem for U