When excessive salt, chemicals, and other runoff enters local streams, it will have a negative effect on the ecosystems by causing pollution.
Pollution refers to the contamination of the air, soil, or water bodies due to the accumulation of contaminants as above described.
Runoff may lead to the accumulation of pollutants on the water and therefore it may have a negative effect on the ecosystem.
In conclusion, when excessive salt, chemicals, and other runoff enters local streams, it will have a negative effect on the ecosystems by causing pollution.
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