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

VariableCorrelationYearsSys. Score
Biomass power generated in Indiar=0.9623yrs414
Biomass power generated in Lithuaniar=0.9521yrs411
Dominion Energy's stock price (D)r=0.9322yrs398
Realty Income's stock price (O)r=0.9122yrs394
Colgate-Palmolive Company's stock price (CL)r=0.922yrs393
US household spending on rented dwellingsr=0.9623yrs393
Google searches for 'i have the flu'r=0.920yrs392
US average dairy skim-solid content of yogurt, nonfrozenr=0.9622yrs389
Wind power generated in Czechiar=0.9522yrs382
U.S. direct investment abroadr=0.9222yrs378
US production of dry milk products (net)r=0.9322yrs378
US Wind Power Generation Capacityr=0.9223yrs377
Google searches for 'tummy ache'r=0.9320yrs377
The number of massage therapists in South Carolinar=0.9420yrs377
The number of customer service representatives in South Carolinar=0.9420yrs377
US production of cheese (other than cottage cheese)r=0.9222yrs376
The number of paralegals in South Carolinar=0.9218yrs374
Adidas Group's Global Net Salesr=0.9123yrs372
Global annual electricity generationr=0.9218yrs372
Global Net Sales for Walmartr=0.9317yrs372
China's Annual Passenger Car Productionr=0.9118yrs370
Revenue of US Broadcasting Industryr=0.917yrs368
GMO use in cornr=0.9224yrs364
US household spending on healthcarer=0.9523yrs362
GMO use in cottonr=0.9223yrs360
Google searches for 'i have a headache'r=0.8820yrs360
Annual US household spending on rented dwellingsr=0.9423yrs360
Annual US household spending on health insurancer=0.9423yrs360
US household spending on health insurancer=0.9423yrs360
Annual US household spending on healthcarer=0.9323yrs358
The average number of likes on SmarterEveryDay YouTube videosr=0.8617yrs358
US household spending on fresh fruitsr=0.9223yrs357
Annual US household spending on fresh fruitsr=0.9123yrs356
Annual US household spending on telephone servicesr=0.9123yrs356
Customer satisfaction with AT&Tr=0.8618yrs354
Annual US household spending on fresh vegetablesr=0.923yrs354
How good SmarterEveryDay YouTube video titles arer=0.917yrs354
Hydopower energy generated in Greenlandr=0.9323yrs350
US milk fat used to produce cheese (excluding cottage cheese)r=0.9222yrs346
Ticket prices at North American movie theatersr=0.922yrs346
Total employee count at Continental AGr=0.8924yrs345
The number of veterinary technologists and technicians in South Carolinar=0.9220yrs344
Popularity of the 'drake' memer=0.8818yrs344
Popularity of the 'red pill blue pill' memer=0.8818yrs344
Total Revenue of the NFL Teamsr=0.920yrs341
Biomass power generated in Papua New Guinear=0.9422yrs340
Economic output of Washington metro arear=0.8921yrs340
Annual Revenue of the Lego Groupr=0.8920yrs340
US dairy skim solids used to produce dry milk productsr=0.9322yrs336
The Coca-Cola Company's stock price (KO)r=0.8722yrs333
The number of consultants in South Carolinar=0.9120yrs332
Wind power generated in Switzerlandr=0.9126yrs330
US dairy skim solids used to produce cheese (other than cottage cheese)r=0.9222yrs324
Biogen's stock price (BIIB)r=0.922yrs323
The number of restaurant cooks in South Carolinar=0.9120yrs322
Liquefied petroleum gas used in Tajikistanr=0.9129yrs320
US dairy skim solids used to produce yogurt, nonfrozenr=0.922yrs312
Fomento Econ's stock price (FMX)r=0.8922yrs312
The number of coaches and scouts in South Carolinar=0.920yrs311
Google searches for 'buy a house'r=0.8820yrs310
Wind power generated in Tunisiar=0.9322yrs309
Unilever's stock price (UL)r=0.8922yrs302
The number of medical assistants in South Carolinar=0.920yrs301
Muenster cheese consumptionr=0.9327yrs300
Google searches for 'highest paying jobs'r=0.8820yrs300
Biomass power generated in Zambiar=0.9322yrs299
Cognizant Technology Solutions' stock price (CTSH)r=0.8922yrs292
Jet fuel used in Bhutanr=0.9325yrs289
ONEOK's stock price (OKE)r=0.8922yrs282
Biomass power generated in Latviar=0.9321yrs278
US average milk-fat content of dry milk products (net)r=0.9122yrs272
Novartis AG's stock price (NVS)r=0.8822yrs270
Wind power generated in Taiwanr=0.9222yrs268
The number of cooks, institution and cafeteria in South Carolinar=0.920yrs261
The Walt Disney Company's stock price (DIS)r=0.8522yrs260
US average milk-fat content of cheese (other than cottage cheese)r=0.922yrs260
Gasoline pumped in Palestinian Territoriesr=0.9225yrs258
CVS stock price (CVS)r=0.8622yrs250
Solar power generated in Belgiumr=0.9218yrs244
US production of butterr=0.922yrs243
Kimberly-Clark's stock price (KMB)r=0.8822yrs240
Solar power generated in Greecer=0.9218yrs234
US production of sour creamr=0.922yrs233
Dollar Tree's stock price (DLTR)r=0.8622yrs230
Liquefied petroleum gas used in Nigerr=0.9222yrs224
US milk fat used to produce butterr=0.922yrs223
Sempra's stock price (SRE)r=0.8722yrs218
Petroluem consumption in Timor-Lester=0.9319yrs213
US production of whey products (net)r=0.8922yrs212
PPG Industries' stock price (PPG)r=0.8722yrs208
Wind power generated in Bulgariar=0.9118yrs202
US milk fat used to produce dry milk productsr=0.8922yrs202
Chunghwa Telecom Co.'s stock price (CHT)r=0.8820yrs198
Biomass power generated in Burmar=0.9217yrs192
US dairy skim solids used to produce butterr=0.922yrs192
Equity Residential's stock price (EQR)r=0.8722yrs188
Wind power generated in Lithuaniar=0.9118yrs182
US milk fat used to produce yogurtr=0.8822yrs180
Eversource Energy's stock price (ES)r=0.8722yrs178
US dairy skim solids used to produce whey productsr=0.8922yrs170
Hormel Foods' stock price (HRL)r=0.8722yrs168


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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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