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Data source: Environmental Protection Agency
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Air quality in Greenville, South Carolina correlates with...

VariableCorrelationYearsSys. Score
Biomass power generated in Indiar=0.9523yrs413
Biomass power generated in Papua New Guinear=0.9522yrs412
Gasoline pumped in Timor-Lester=0.9519yrs406
Fomento Econ's stock price (FMX)r=0.9322yrs398
Google searches for 'i have the flu'r=0.9120yrs394
US household spending on rented dwellingsr=0.9523yrs392
US average dairy skim-solid content of yogurt, nonfrozenr=0.9622yrs389
U.S. direct investment abroadr=0.9222yrs378
US production of whey products (net)r=0.9322yrs378
US dairy skim solids used to produce whey productsr=0.9322yrs376
Google searches for 'how to make baby'r=0.9220yrs376
The number of coaches and scouts in South Carolinar=0.9320yrs376
The number of clergy in South Carolinar=0.9220yrs374
China's Annual Passenger Car Productionr=0.9218yrs372
Google searches for 'scooby doo where are you'r=0.920yrs372
The number of civil engineers in South Carolinar=0.9120yrs372
GMO use in cornr=0.9224yrs364
US household spending on healthcarer=0.9523yrs362
How good SmarterEveryDay YouTube video titles arer=0.9417yrs360
GMO use in cottonr=0.9223yrs360
Enbridge's stock price (ENB)r=0.8722yrs358
Dominion Energy's stock price (D)r=0.8722yrs358
US household spending on health insurancer=0.9323yrs358
US household spending on fresh fruitsr=0.9223yrs357
How cool SmarterEveryDay YouTube video titles arer=0.9217yrs357
How professional-sounding SmarterEveryDay YouTube video titles arer=0.9217yrs357
Annual US household spending on telephone servicesr=0.923yrs354
Wind power generated in Czechiar=0.9422yrs350
US dairy skim solids used to produce yogurt, nonfrozenr=0.9322yrs346
The distance between Saturn and Mercuryr=0.8944yrs345
The distance between Saturn and the Sunr=0.8844yrs344
The distance between Saturn and Earthr=0.8844yrs344
The number of paralegals in South Carolinar=0.9118yrs342
US Wind Power Generation Capacityr=0.8723yrs340
Total Revenue of the NFL Teamsr=0.8920yrs340
Biomass power generated in Zambiar=0.9422yrs340
Total employee count at Continental AGr=0.8524yrs339
Economic output of Washington metro arear=0.8721yrs338
Adidas Group's Global Net Salesr=0.8823yrs338
Number of Public Library Members in the UKr=0.9212yrs338
Number of Walmart stores worldwider=0.8915yrs338
Total annual sales revenue of Ford Motors in Canadar=0.8719yrs337
US Biomass Energy Productionr=0.8817yrs335
Global Net Sales for Walmartr=0.8717yrs334
US production of dry milk products (net)r=0.9122yrs334
Wind power generated in Tunisiar=0.9322yrs329
Biogen's stock price (BIIB)r=0.8622yrs327
Annual US household spending on health insurancer=0.923yrs324
US milk fat used to produce yogurtr=0.9122yrs324
Annual US household spending on rented dwellingsr=0.8923yrs322
Annual US household spending on healthcarer=0.8823yrs321
Wind power generated in Falkland Islandsr=0.9222yrs318
Chunghwa Telecom Co.'s stock price (CHT)r=0.8520yrs314
The distance between Saturn and the moonr=0.8844yrs314
US production of cheese (other than cottage cheese)r=0.922yrs313
Google searches for 'tummy ache'r=0.8820yrs310
Hydopower energy generated in Greenlandr=0.9223yrs308
US dairy skim solids used to produce dry milk productsr=0.9122yrs303
The number of customer service representatives in South Carolinar=0.920yrs301
Google searches for 'how to make baby'r=0.8820yrs300
Wind power generated in Taiwanr=0.9222yrs298
US dairy skim solids used to produce cheese (other than cottage cheese)r=0.922yrs292
How 'hip and with it' SmarterEveryDay YouTube video titles arer=0.8817yrs291
The number of massage therapists in South Carolinar=0.8920yrs290
Google searches for 'two day shipping'r=0.8720yrs288
Wind power generated in Bulgariar=0.9418yrs286
Global annual electricity generationr=0.8618yrs283
US dairy skim solids used to produce butterr=0.922yrs282
How insightful SmarterEveryDay YouTube video titles arer=0.8817yrs281
The number of veterinary technologists and technicians in South Carolinar=0.8820yrs278
Revenue of US Broadcasting Industryr=0.8617yrs277
Google searches for 'headache remedies'r=0.8620yrs276
Biomass power generated in Lithuaniar=0.9221yrs276
The number of court and municipal clerks in South Carolinar=0.8820yrs268
Biomass power generated in Latviar=0.9121yrs265
The number of mechanical engineers in South Carolinar=0.8720yrs256
Biomass power generated in Burmar=0.9317yrs254
US average milk-fat content of dry milk products (net)r=0.922yrs250
The number of pharmacists in South Carolinar=0.8620yrs246
Petroluem consumption in Timor-Lester=0.9319yrs243
US average milk-fat content of yogurt, nonfrozenr=0.922yrs240
The number of registered nurses in South Carolinar=0.8818yrs236
Solar power generated in Greecer=0.9118yrs232
The number of restaurant cooks in South Carolinar=0.8620yrs225
US production of butterr=0.922yrs223
Gasoline pumped in Micronesiar=0.922yrs222
The number of consultants in South Carolinar=0.8520yrs214
US milk fat used to produce cheese (excluding cottage cheese)r=0.922yrs213
US milk fat used to produce butterr=0.922yrs203
Altria Group's stock price (MO)r=0.8422yrs199
US production of sour creamr=0.8922yrs192
Colgate-Palmolive Company's stock price (CL)r=0.8422yrs189
Biomass power generated in Rwandar=0.922yrs184
Cognizant Technology Solutions' stock price (CTSH)r=0.8422yrs179
US milk fat used to produce whey products (net)r=0.8722yrs178
Biomass power generated in Nigeriar=0.8822yrs172
ONEOK's stock price (OKE)r=0.8422yrs169
US milk fat used to produce dry milk productsr=0.8622yrs167
Hydopower energy generated in Sierra Leoner=0.8722yrs160
Muenster cheese consumptionr=0.8827yrs152
Gasoline pumped in Cook Islandsr=0.8922yrs150


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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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