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Data source: Environmental Protection Agency
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Air pollution in Billings, Montana correlates with...

VariableCorrelationYearsSys. Score
Automotive recalls issued by Mercedes-Benz USAr=0.543yrs174
Automotive recalls issued by Nissan North Americar=0.543yrs174
Total likes of MinuteEarth YouTube videosr=0.7611yrs167
Number of Atlantic Hurricanes each yearr=0.7316yrs164
Average length of Vihart's YouTube videosr=0.7115yrs164
Average length of Extra History YouTube videosr=0.6912yrs158
Solar power generated in United Statesr=0.5538yrs153
Renewable energy production in South Africar=0.5242yrs152
Biomass power generated in Turkiyer=0.5242yrs152
The marriage rate in Montanar=0.623yrs149
Activision Blizzard's stock price (ATVI)r=0.6413yrs145
FedEx's stock price (FDX)r=0.5622yrs144
Average SAT score in critical readingr=0.4733yrs144
Average SAT score in mathr=0.4533yrs141
Google searches for 'Suez Canal'r=0.6720yrs138
MercadoLibre's stock price (MELI)r=0.5716yrs136
Google searches for 'suez canal'r=0.6520yrs135
The number of building inspectors in Montanar=0.6520yrs134
Visitors to SeaWorld Floridar=-0.8215yrs131
Sales of LP/Vinyl Albumsr=0.4730yrs126
North American digital comic sales volumer=0.6313yrs124
Average length of Mark Rober YouTube videosr=0.6613yrs124
US edible fishery product importsr=0.617yrs123
The number of movies Zendaya appeared inr=0.7113yrs123
Median US Household Incomer=0.4832yrs120
xkcd comics published about mapsr=0.5516yrs120
Electricity generation in Zambiar=0.542yrs120
Average household spend on Christmas Giftsr=0.4724yrs118
Number of websites on the internetr=0.4628yrs118
Google searches for 'do vaccines work'r=0.5420yrs118
The number of college sociology teachers in Montanar=0.5320yrs116
Votes for Republican Senators in Montanar=0.5614yrs116
Cheddar cheese consumptionr=0.5627yrs115
The number of architects in Montanar=0.5220yrs114
Cream and Neufchatel cheese consumptionr=0.5527yrs113
Worldwide count of earthquakes with a magnitude between 8.0 and 9.9r=0.4922yrs112
Average length of Deep Look YouTube videosr=0.6710yrs112
Rain in Parisr=0.5117yrs111
Bachelor's degrees awarded in Transportationr=0.6710yrs110
US household spending on major appliancesr=0.6123yrs110
Milk-fat consumptionr=0.4932yrs109
The number of movies Timothee Chalamet appeared inr=0.5916yrs108
Bloomberg Money Stuff articles about bitcoinr=0.6810yrs108
Solar power generated in South Korear=0.5632yrs108
Google's Net Incomer=0.4819yrs107
Popularity of the first name Aylar=0.4643yrs106
Global Payments' stock price (GPN)r=0.5222yrs106
Bachelor's degrees awarded in Psychologyr=0.6410yrs105
The average number of likes on Matt Parker's YouTube videosr=0.6313yrs100
Renewable energy production in Zambiar=0.4942yrs98
Zimmer Biomet Holdings' stock price (ZBH)r=0.5122yrs94
Hydopower energy generated in Zambiar=0.4942yrs88
The Walt Disney Company's stock price (DIS)r=0.4722yrs83
Average length of Matt Parker's YouTube videosr=0.5813yrs82
American cheese consumptionr=0.4832yrs78
Google searches for 'dr pepper vs mr pibb'r=0.4620yrs76
The number of computer programmers in Montanar=0.4620yrs76
Rain in Parisr=0.4817yrs76
Solar power generated in Gabonr=0.7710yrs73
Medtronic's stock price (MDT)r=0.4922yrs72
How geeky 'Be Smart' science YouTube video titles arer=0.8411yrs69
American-type cheese consumptionr=0.527yrs66
The number of commercial pilots in Montanar=0.4720yrs66
Average temperature in Torontor=0.4619yrs66
Charter Communications' stock price (CHTR)r=0.5614yrs62
Solar power generated in Eswatinir=0.7212yrs58
The number of personal financial advisors in Montanar=0.4620yrs55
Electronic Arts' stock price (EA)r=0.4922yrs52
Total length of Mark Rober YouTube videosr=0.5513yrs48
Solar power generated in Estoniar=0.7113yrs47
The number of interior designers in Montanar=0.4620yrs45
Take-Two Interactive Software's stock price (TTWO)r=0.4822yrs40
Average number of comments on Matt Parker's YouTube videosr=0.5513yrs38
Solar power generated in Mozambiquer=0.7310yrs37
Average length of 'Be Smart' science YouTube videosr=0.5711yrs28
Capital One Financial's stock price (COF)r=0.4722yrs28
Total solar power generated globallyr=0.5139yrs23
Fidelity National Information Services' stock price (FIS)r=0.4722yrs18
How 'hip and with it' LEMMiNO YouTube video titles arer=0.7312yrs14
Renewable energy production in Australiar=0.4842yrs12
Ryanair Holdings' stock price (RYAAY)r=0.4722yrs8
Average length of Tom Scott's YouTube videosr=0.515yrs2
Electricity generation in Comorosr=0.4842yrs2
Toyota Motor's stock price (TM)r=0.4622yrs-3
Average length of Steve Mould's YouTube videosr=0.515yrs-8
Solar power generated in Moldovar=0.718yrs-8
Autodesk's stock price (ADSK)r=0.4622yrs-13
Total length of AsapSCIENCE YouTube videosr=0.5212yrs-18
Solar power generated in Nepalr=0.6615yrs-18
Corning's stock price (GLW)r=0.4622yrs-23
Biomass power generated in Perur=0.4842yrs-28
Total comments on Mark Rober YouTube videosr=0.513yrs-30
Biomass power generated in South Korear=0.5827yrs-38
Average number of comments on 'Be Smart' science YouTube videosr=0.5111yrs-40
Discover Financial Services' stock price (DFS)r=0.4816yrs-46
Solar power generated in Chinar=0.5432yrs-50
Total likes of Tom Scott's YouTube videosr=0.4815yrs-51
T-Mobile Us' stock price (TMUS)r=0.4716yrs-58
Solar power generated in Ethiopiar=0.6614yrs-60
Average number of comments on Steve Mould's YouTube videosr=0.4715yrs-62
Average number of comments on Mark Rober YouTube videosr=0.4813yrs-73


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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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