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Data source: Environmental Protection Agency
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Air quality in Trenton, New Jersey correlates with...

VariableCorrelationYearsSys. Score
Average milk produced per cow in the USr=0.8743yrs382
Total number of automotive recallsr=0.8643yrs380
Hotdogs consumed by Nathan's Hot Dog Eating Competition Championr=0.8643yrs364
Electricity generation in Kuwaitr=0.8942yrs363
Electricity generation in Antigua and Barbudar=0.8842yrs362
Electricity generation in Argentinar=0.8842yrs362
USA Populationr=0.8843yrs361
US Annual Tax Revenuer=0.8542yrs356
Number of Lawyers in the United Statesr=0.8534yrs355
Google searches for 'i have the flu'r=0.8520yrs355
Number of households headed by single fathers in the United Statesr=0.8832yrs352
Intel Corporation's annual revenuer=0.8636yrs351
Inflation in the USr=0.8731yrs348
Annual Revenue of Walt Disney Companyr=0.8532yrs348
Number of Registered Vehicles in the USr=0.8632yrs347
Popularity of the first name Wyattr=0.8943yrs341
Popularity of the first name Naomir=0.8943yrs341
Popularity of the first name Josiahr=0.8943yrs341
Votes for the Democratic Presidential candidate in New Jerseyr=0.9411yrs341
Yogurt consumptionr=0.8632yrs334
Number of public school students in 12th grader=0.8733yrs332
Electricity generation in Bahrainr=0.8842yrs332
How cool The Game Theorists YouTube video titles arer=0.915yrs322
Fossil fuel use in Bahrainr=0.8842yrs322
Electricity generation in Brazilr=0.8842yrs312
Popularity of the first name Elainar=0.8943yrs311
Electricity generation in Cabo Verder=0.8842yrs302
Popularity of the first name Asar=0.8943yrs301
Renewable energy production in Cameroonr=0.8842yrs292
Popularity of the first name Chanar=0.8943yrs291
Fossil fuel use in Egyptr=0.8842yrs282
Popularity of the first name Chaimr=0.8943yrs281
Electricity generation in Gambiar=0.8842yrs272
Popularity of the first name Minar=0.8943yrs271
Automotive recalls issued by BMW of North Americar=0.7843yrs266
Automotive recalls for issues with the Electrical Systemr=0.843yrs264
Fossil fuel use in Gambiar=0.8842yrs262
Popularity of the first name Lucasr=0.8843yrs260
Automotive recalls issued by Hondar=0.7443yrs260
Automotive recalls for issues with the Power Trainr=0.7643yrs258
Patents granted in the USr=0.8441yrs256
UFO sightings in New Jerseyr=0.8442yrs256
Electricity generation in Gibraltarr=0.8842yrs252
Patents granted in the USr=0.8441yrs252
Automotive recalls for issues with Exterior Lightingr=0.7243yrs252
Automotive recalls issued by Hyundai Motor Americar=0.7337yrs252
Popularity of the first name Nolanr=0.8843yrs250
Automotive recalls issued by Nissan North Americar=0.6743yrs249
Customer satisfaction with Appler=0.7928yrs249
Budget for largest movie productionr=0.8143yrs248
Total number of live births in Australiar=0.8143yrs246
Automotive recalls issued by Mercedes-Benz USAr=0.6543yrs246
Customer satisfaction with Dillard'sr=0.7727yrs245
Average SAT score in mathr=0.733yrs244
Automotive recalls issued by Chryslerr=0.6343yrs243
Electricity generation in Jordanr=0.8842yrs242
Gender pay gap in the U.S.r=0.8432yrs242
Popularity of the first name Genesisr=0.8843yrs240
Electricity generation in Kiribatir=0.8842yrs232
Popularity of the first name Rubyr=0.8843yrs230
UEFA European Cup and Champions League Top Scorer's Goal Countr=0.7143yrs230
Number of public school students in 11th grader=0.8533yrs224
US milk fat used to produce yogurtr=0.822yrs223
Average temperature in Sydneyr=0.6543yrs223
Electricity generation in Lebanonr=0.8842yrs222
Number of highschoolers in the USr=0.8333yrs222
The number of movies Willem Dafoe appeared inr=0.7344yrs222
Popularity of the first name Lucyr=0.8843yrs220
The distance between Neptune and Uranusr=0.7544yrs219
Fossil fuel use in Lebanonr=0.8842yrs212
Popularity of the first name Braxtonr=0.8843yrs210
Electricity generation in Nicaraguar=0.8842yrs202
Popularity of the first name Edenr=0.8843yrs200
Electricity generation in Solomon Islandsr=0.8842yrs192
American cheese consumptionr=0.8132yrs192
Popularity of the first name Ceceliar=0.8843yrs190
Total Sales at Clothing and Accessories Storesr=0.8331yrs190
Automotive recalls for issues with Suspensionr=0.6443yrs190
Number of public school students in 10th grader=0.8233yrs190
Electricity generation in South Korear=0.8842yrs182
Milk-fat consumptionr=0.8132yrs182
Annual count of part-time employees in the United Statesr=0.8133yrs181
Popularity of the first name Mosher=0.8843yrs180
Electricity generation in Trinidad and Tobagor=0.8842yrs172
US Shoe Store Salesr=0.830yrs171
Popularity of the first name Havenr=0.8843yrs170
Italian-type cheese consumptionr=0.8327yrs170
Gasoline Prices in the USr=0.7633yrs166
Popularity of the first name Aliar=0.8843yrs160
New York Times Fiction Best Sellersr=0.7335yrs160
Hispanic cheese consumptionr=0.8226yrs158
Total budget of Marvel comic-based films releasedr=0.7435yrs155
Popularity of the first name Ibrahimr=0.8843yrs150
Number of internet usersr=0.8124yrs150
Mozzarella cheese consumptionr=0.8227yrs148
Number of Las Vegas Hotel Room Check-Insr=0.7534yrs145
Global plane crashesr=0.6943yrs138
Super Bowl TV viewershipr=0.7133yrs130
Christmas Price Index in the United Statesr=0.7431yrs123
Number of firearms manufactured in the USr=0.736yrs117
Total Number of Successful Mount Everest Climbsr=0.7132yrs112


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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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