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Browse topic: (Science.gov home) > Environment and Environmental Quality > Noise Quality
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A:
Aircraft - Research guide from the Library of Congress Science Specialists [U.S. Library of Congress (LOC)]

C:
Cleanup (Brownfields) - Brownfields are abandoned, idled, or under-used industrial and commercial facilities where expansion or redevelopment is complicated by real or perceived environmental contamination [U.S. Environmental Protection Agency (EPA)]

N:
Natural Sounds - NPS Natural Sounds program explores natural noise sources to understand their effects and avert negative impacts throughout the National Park System. [U.S. Department of the Interior (DOI), National Park Service (NPS)]