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<p><b>Noise pollution</b>, is the propagation of <a href="page.php?w=noise">noise</a> or <a href="page.php?w=sound">sound</a> with potential harmful effects on humans and animals. The main sources of outdoor noise worldwide are machines, transportation, and propagation systems. Poor <a href="page.php?w=urban_planning">urban planning</a> may give rise to noise pollution. Side-by-side industrial and residential zones can result in noise pollution in residential areas. Some of the main sources of noise in residential areas include <a href="page.php?w=loud_music">loud music</a>,</p><p>
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