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Data source: Environmental Protection Agency
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Air pollution in Sioux City, Iowa correlates with...

VariableCorrelationYearsSys. Score
Kerosene used in Germany, Eastr=111yrs406
Liquefied petroleum gas used in Icelandr=0.6435yrs180
Liquefied petroleum gas used in Cabo Verder=0.5842yrs178
Popularity of the first name Jazlynr=0.6341yrs165
Popularity of the first name Kareemr=0.6142yrs163
Tesla's stock price (TSLA)r=0.6711yrs154
Average length of Vihart's YouTube videosr=0.6413yrs151
Gasoline Prices in the USr=0.5632yrs150
CRH plc's stock price (CRH)r=0.6120yrs148
Jet fuel used in Djiboutir=0.5742yrs147
The number of movies Jessica Biel appeared inr=0.6725yrs144
Number of edits to the Wikipedia article for Morgan Stanleyr=0.5520yrs143
The average number of likes on OverSimplified YouTube videosr=0.696yrs142
Number of edits to the Wikipedia article for Thanksgivingr=0.5815yrs142
Number of edits to the Wikipedia article for Big Birdr=0.5220yrs138
The number of movies Benedict Wong appeared inr=0.5930yrs137
The average number of likes on PBS Space Time YouTube videosr=0.647yrs135
Popularity of the first name Sarahir=0.5641yrs134
Number of Lawyers in the United Statesr=0.4933yrs130
Google searches for 'Tom Scott'r=0.6515yrs130
Customer satisfaction with Walgreensr=0.5116yrs130
Total Sales at Clothing and Accessories Storesr=0.5330yrs128
Number of Registered Vehicles in the USr=0.5332yrs128
Toyota Motor's stock price (TM)r=0.4820yrs128
Total value of all $50 bills printedr=0.7611yrs126
Total budget of Marvel comic-based films releasedr=0.4834yrs125
Number of households headed by single fathers in the United Statesr=0.532yrs124
Gender pay gap in the U.S.r=0.4932yrs124
Intel Corporation's annual revenuer=0.4735yrs122
Customer satisfaction with HuffPostr=0.5411yrs120
Inflation in the USr=0.4830yrs118
Nuclear power generation in Brazilr=0.5640yrs116
The number of bridge and lock tenders in Iowar=0.5419yrs116
xkcd comics published about romancer=0.5315yrs116
Worldwide count of earthquakes with a magnitude between 8.0 and 9.9r=0.5122yrs114
Yogurt consumptionr=0.5232yrs114
The number of movies Angelina Jolie appeared inr=0.4740yrs114
The number of accountants and auditors in Iowar=0.5219yrs113
Greece's annual import volumer=0.5119yrs112
Number of highschoolers in the USr=0.5332yrs110
Number of public school students in 11th grader=0.5332yrs110
Number of public school students in 12th grader=0.5332yrs110
Violent crime ratesr=-0.537yrs110
Milk-fat consumptionr=0.4832yrs108
Arson in United Statesr=-0.5337yrs108
Burglaries in Iowar=-0.5337yrs108
Ana Ivanovic's WTA Finals playedr=0.6210yrs106
Geothermal power generated in Indonesiar=0.5540yrs105
Popularity of the first name Rylier=0.5639yrs102
Average length of Technology Connections YouTube videosr=0.67yrs99
Garmin's stock price (GRMN)r=0.4820yrs98
Kerosene used in Francer=0.5542yrs94
Popularity of the first name Saiger=0.5638yrs92
Average length of 'Be Smart' science YouTube videosr=0.589yrs88
Entergy's stock price (ETR)r=0.4720yrs86
Hydopower energy generated in French Polynesiar=0.5439yrs82
The number of movies Eva Mendes appeared inr=0.5918yrs80
Popularity of the first name Jordinr=0.5241yrs78
Number of public school students in 10th grader=0.5132yrs78
Total length of 'Be Smart' science YouTube videosr=0.579yrs76
Marvell Technology's stock price (MRVL)r=0.4620yrs75
Liquefied petroleum gas used in Chiler=0.5638yrs72
The number of movies Tilda Swinton appeared inr=0.4636yrs68
Popularity of the first name Makennar=0.5140yrs66
Total likes of PBS Space Time YouTube videosr=0.567yrs63
Canadian Imperial Bank of Commerce's stock price (CM)r=0.4520yrs62
Number of internet usersr=0.4624yrs62
Petroluem consumption in Netherlands Antillesr=0.5242yrs60
The number of movies Idris Elba appeared inr=0.5126yrs56
Popularity of the first name Armanir=0.5336yrs55
Number of liposuctions performed on womenr=0.4625yrs55
Average length of Matt Parker's YouTube videosr=0.5211yrs51
Petroluem consumption in Germany, Westr=0.8111yrs47
MercadoLibre's stock price (MELI)r=0.5214yrs46
Remaining Forest Cover in the Brazilian Amazonr=-0.5435yrs46
The number of movies Mila Kunis appeared inr=0.527yrs46
Popularity of the first name Angier=0.4942yrs45
The average number of likes on Matt Parker's YouTube videosr=0.5111yrs40
Gasoline pumped in Trinidad and Tobagor=0.542yrs36
The number of movies Leonardo DiCaprio appeared inr=0.4633yrs36
Popularity of the first name Koltonr=0.540yrs34
National Grid's stock price (NGG)r=0.4816yrs34
Total likes of MinuteEarth YouTube videosr=0.519yrs28
Average number of comments on OverSimplified YouTube videosr=0.536yrs18
Electricity generation in Arubar=0.5236yrs12
Popularity of the first name Chrisr=0.4942yrs10
Total length of Deep Look YouTube videosr=0.518yrs6
Solar power generated in Gabonr=0.710yrs2
Popularity of the first name Maddisonr=0.5137yrs-2
Average length of OverSimplified YouTube videosr=0.516yrs-6
Biomass power generated in Taiwanr=0.5333yrs-10
Popularity of the first name Kayleighr=0.4938yrs-14
How nerdy Matt Parker's YouTube video titles arer=0.6711yrs-16
Biomass power generated in Hungaryr=0.5332yrs-21
Popularity of the first name Madisynr=0.536yrs-24
Average length of Deep Look YouTube videosr=0.498yrs-26
Gasoline pumped in British Virgin Islandsr=0.5235yrs-32
Average length of Mark Rober YouTube videosr=0.4611yrs-38
Petroluem consumption in Arubar=0.5136yrs-43
Biomass power generated in Norwayr=0.4737yrs-55
Hydopower energy generated in Fijir=0.4539yrs-66


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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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