Editing Environmental noise (section)

=== United Kingdom ===

The United Kingdom has 28 metropolitan areas, and [[London]] is the largest with 8.3&nbsp;million inhabitants. Most are in England. Three are in Northern Ireland, Scotland and Wales.

Within the United Kingdom, researchers revealed that approximately 55% of the population lived where the sound level exceeded the recommended level of 55&nbsp;dB Leq in the daytime and 67% lived where the sound level  exceeded the recommended level of 45&nbsp;dB Leq at night.<ref name=":5">{{Cite journal|last1=Stansfeld|first1=Stephen|last2=Crombie|first2=Rosanna|date=2011|title=Cardiovascular effects of environmental noise: Research in the United Kingdom|journal=Noise and Health|volume=13|issue=52|pages=229–33|doi=10.4103/1463-1741.80159|pmid=21537107|issn=1463-1741|doi-access=free}}</ref> About 20% of London residents were exposed to environmental noise near their home that was above 60 dBA Leq. All of these environmental noise exposures have led to higher increases in blood pressure within the UK population.<ref name=":5" />