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Data source: Environmental Protection Agency
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Air pollution in Lexington, Kentucky correlates with...

VariableCorrelationYearsSys. Score
United States music album salesr=0.9116yrs368
Google searches for 'desktop background'r=0.8717yrs335
The number of postmasters in Kentuckyr=0.8520yrs334
The number of home appliance repairers in Kentuckyr=0.8619yrs334
The number of first-line retail sales supervisors in Kentuckyr=0.913yrs334
GMO use in cottonr=0.8523yrs320
xkcd comics published about romancer=0.8517yrs306
Pirate attacks globallyr=0.8714yrs305
Liquefied petroleum gas used in Kosovor=0.8814yrs300
The number of judges in Kentuckyr=0.8714yrs270
Associates degrees awarded in Educationr=0.8911yrs262
Associates degrees awarded in Business managementr=0.8711yrs259
Associates degrees awarded in Business and managementr=0.8711yrs259
Deutsche Bank Aktiengesellschaft's stock price (DB)r=0.822yrs243
Viewership count of American Idol Season Finaler=0.8221yrs230
The number of executive administrative assistants in Kentuckyr=0.8713yrs230
US production of fluid beverage milkr=0.8422yrs229
US dairy skim solids used to produce milk fat and skim solids byproduct fluid beverage milkr=0.8422yrs228
National Lacrosse Champions' Final Pointr=0.825yrs226
Hydopower energy generated in Syriar=0.6442yrs220
Gasoline pumped in Irelandr=0.6543yrs220
Asthma prevalence in American childrenr=0.8417yrs218
Number of edits to the Wikipedia article for Thanksgivingr=0.8316yrs216
Master's degrees awarded in Library sciencer=0.8710yrs214
GMO use in cottonr=0.8423yrs213
Banco Bilbao Vizcaya Argentaria's stock price (BBVA)r=0.7922yrs212
Popularity of the first name Nathanr=0.7343yrs212
The divorce rate in Kentuckyr=0.7723yrs211
Banco Santander's stock price (SAN)r=0.7822yrs210
US household spending on mortgage interest and chargesr=0.8423yrs210
US household spending on fresh milk and creamr=0.8223yrs207
Popularity of the first name Elvisr=0.6943yrs206
US household spending on vehicle insurancer=0.8123yrs206
Master's degrees awarded in Educationr=0.8610yrs203
Popularity of the first name Deliar=0.6643yrs202
Google searches for 'daylight savings time'r=0.8120yrs194
US music album salesr=0.8416yrs193
Google searches for 'how to immigrate to canada'r=-0.8520yrs192
Master's degrees awarded in Transportationr=0.8510yrs192
The average number of likes on SmarterEveryDay YouTube videosr=-0.8717yrs191
Cigarette Smoking Rate for US adultsr=0.7821yrs189
The number of proofreaders in Kentuckyr=0.8519yrs188
Customer satisfaction with Delta Airlinesr=-0.7728yrs188
Customer satisfaction with American Airlinesr=-0.7828yrs188
Customer satisfaction with United Airlinesr=-0.7528yrs186
Kerosene used in Tanzaniar=0.6735yrs185
Asthma prevalence in American childrenr=0.7317yrs182
Asthma attacks in American childrenr=0.6923yrs182
Asthma attacks in American childrenr=0.6623yrs178
BP's stock price (BP)r=0.7422yrs177
The marriage rate in Kentuckyr=0.6623yrs173
Popularity of the first name Chrisr=0.6543yrs170
GMO use in cottonr=0.7523yrs170
xkcd comics published about existentialismr=0.7617yrs168
Patents granted to LG Electronicsr=-0.9512yrs168
US average milk-fat content of milk fat and skim solids byproduct fluid beverage milkr=0.7822yrs167
Asthma prevalence in American childrenr=0.7217yrs166
US household spending on clothin for womenr=0.7523yrs166
Popularity of the first name Abbier=0.6543yrs160
Google searches for 'President phone number'r=-0.8420yrs160
Biomass power generated in Jordanr=0.7920yrs151
Popularity of the first name Caler=0.6543yrs150
Biogen's stock price (BIIB)r=-0.8322yrs146
Popularity of the first name Orlandor=0.6443yrs138
Fossil fuel use in Netherlands Antillesr=0.6242yrs138
Delta Airlines' stock price (DAL)r=-0.8816yrs136
The number of photographers in Kentuckyr=0.820yrs131
Google searches for 'spurious correlations'r=-0.8820yrs130
Popularity of the first name Antonyr=0.6443yrs128
Fossil fuel use in Czechiar=0.6929yrs125
Kimberly-Clark's stock price (KMB)r=-0.8122yrs124
The number of postal service machine operators in Kentuckyr=0.820yrs121
Popularity of the first name Rhiannar=0.6443yrs118
Google searches for 'smol'r=-0.8320yrs116
Hormel Foods' stock price (HRL)r=-0.8122yrs114
Gasoline pumped in Croatiar=0.730yrs114
The number of bill collectors in Kentuckyr=0.7720yrs108
Popularity of the first name Kileyr=0.6343yrs107
Gasoline pumped in Ukrainer=0.730yrs104
PPG Industries' stock price (PPG)r=-0.822yrs103
Popularity of the first name Willr=0.6243yrs96
The number of college computer science teachers in Kentuckyr=0.7720yrs96
Fossil fuel use in Croatiar=0.6730yrs93
Woodside Energy Group's stock price (WDS)r=0.7715yrs92
Electricity generation in Djiboutir=0.5942yrs83
Telefónica's stock price (TEF)r=0.7222yrs81
Fossil fuel use in Djiboutir=0.5942yrs73
The number of operations research analysts in Kentuckyr=-0.8920yrs70
HSBC Holdings' stock price (HSBC)r=0.722yrs68
Petroluem consumption in Croatiar=0.6830yrs62
The number of career/technical education teachers, secondary school in Kentuckyr=0.8413yrs60
Eni S.p.A.'s stock price (E)r=0.6922yrs56
Petroluem consumption in Syriar=0.642yrs52
Barclays' stock price (BCS)r=0.6822yrs45
Fossil fuel use in Hungaryr=0.5742yrs40
Vodafone Group's stock price (VOD)r=0.6622yrs32
Petroluem consumption in Francer=0.5843yrs30
Hydopower energy generated in Rwandar=-0.7442yrs18
Petroluem consumption in Switzerlandr=0.5743yrs8
Jet fuel used in Cubar=0.5742yrs-3
Biomass power generated in Paraguayr=-0.6842yrs-18


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You caught me! While it would be intuitive to sort only by "correlation," I have a big, weird database. If I sort only by correlation, often all the top results are from some one or two very large datasets (like the weather or labor statistics), and it overwhelms the page.

I can't show you *all* the correlations, because my database would get too large and this page would take a very long time to load. Instead I opt to show you a subset, and I sort them by a magic system score. It starts with the correlation, but penalizes variables that repeat from the same dataset. (It also gives a bonus to variables I happen to find interesting.)
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