Urban Sprawl

 https://smartgrowthamerica.org/where-america-is-sprawling-and-what-it-means/ 

https://www.macrotrends.net/global-metrics/cities/23043/las-vegas/population

https://www.weather.gov/vef/about

https://www.britannica.com/place/Los-Angeles-California

https://web.archive.org/web/20150924102819/http://www.smartcommunities.ncat.org/articles/sprawl.pdf

https://www.census.gov/glossary/#term_Populationestimates

https://web.archive.org/web/20200515055014/https://www.who.int/healthinfo/survey/whoqol-qualityoflife/en/.