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Data source: Environmental Protection Agency
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Air pollution in Chico, California correlates with...

VariableCorrelationYearsSys. Score
Votes for Democratic Senators in Californiar=0.949yrs318
Votes for the Democratic Presidential candidate in Californiar=0.926yrs298
Votes for Democratic Senators in Californiar=0.879yrs262
Average number of comments on Tom Scott's YouTube videosr=0.8113yrs192
Total comments on Tom Scott's YouTube videosr=0.813yrs190
Number of times 17 was a winning Mega Millions numberr=0.719yrs178
Total length of Technology Connections YouTube videosr=0.847yrs175
xkcd comics published about chartsr=0.815yrs172
VMware's stock price (VMW)r=0.7612yrs162
Number of times 22 was a winning Mega Millions numberr=0.6720yrs160
ST Microelectronics' stock price (STM)r=0.6820yrs158
Renewable energy production in Cote d'Ivoirer=0.5937yrs158
Visa Inc.'s stock price (V)r=0.7213yrs157
Electricity generation in Guinear=0.5737yrs155
Average SAT score in mathr=0.5532yrs155
Automotive recalls issued by Mercedes-Benz USAr=0.537yrs152
Hydopower energy generated in Guinear=0.5537yrs152
Automotive recalls for issues with Service Brakes, Hydraulicr=0.5237yrs151
Automotive recalls issued by Volkswagen Group of Americar=0.4837yrs150
Average SAT score in critical readingr=0.5132yrs149
Automotive recalls for issues with the Tiresr=0.537yrs148
Popularity of the 'fbi agent' memer=0.7216yrs148
Automotive recalls for issues with the Fuel System, Gasoliner=0.4937yrs146
Automotive recalls issued by BMW of North Americar=0.4537yrs145
Google searches for 'elon musk'r=0.7712yrs145
The average number of likes on LEMMiNO YouTube videosr=0.8110yrs144
Popularity of the 'i am once again' memer=0.716yrs144
Popularity of the 'is this a butterfly' memer=0.6816yrs142
Average SAT score in writingr=0.5716yrs142
Number of times 23 was a winning Mega Millions numberr=0.5519yrs140
xkcd comics published about politicsr=0.6815yrs139
Number of Atlantic Hurricanes each yearr=0.5615yrs138
Google searches for 'adopt a cat'r=0.6818yrs138
Popularity of the first name Hallier=0.5937yrs135
Google searches for 'adopt a dog'r=0.6618yrs134
Number of times 16 was a winning Mega Millions numberr=0.519yrs133
Paypal's Number of Active Registered User Accountsr=0.6912yrs132
Rain in Torontor=0.6714yrs132
The average number of likes on Tom Scott's YouTube videosr=0.7813yrs132
American Water Works Company's stock price (AWK)r=0.7213yrs127
Total comments on Technology Connections YouTube videosr=0.827yrs122
Liquefied petroleum gas used in Namibiar=0.632yrs122
Votes for the Democratic Presidential candidate in Californiar=0.826yrs118
Activision Blizzard's stock price (ATVI)r=0.7112yrs114
Total likes of Tom Scott's YouTube videosr=0.7713yrs110
Renewable energy production in Boliviar=0.5437yrs110
Popularity of the 'spiderman pointing' memer=0.6416yrs106
ON Semiconductor's stock price (ON)r=0.6718yrs104
Google searches for 'who is alexa'r=0.6815yrs104
Gasoline pumped in Dominican Republicr=0.5637yrs100
Average length of MinuteEarth YouTube videosr=0.789yrs98
Google searches for '3Blue1Brown'r=0.6715yrs93
Popularity of the 'change my mind' memer=0.6216yrs92
Broadcom's stock price (AVGO)r=0.6912yrs92
Votes for the Libertarian Presidential candidate in Californiar=0.766yrs89
Liquefied petroleum gas used in Chadr=0.5535yrs87
Average length of minutephysics YouTube videosr=0.7511yrs86
Google searches for 'takeout near me'r=0.6517yrs82
Sony Group's stock price (SONY)r=0.6420yrs82
Popularity of the 'slaps roof of car' memer=0.6116yrs81
Total likes of LockPickingLawyer YouTube videosr=0.787yrs76
Solar power generated in Iraqr=0.799yrs75
Charter Communications' stock price (CHTR)r=0.712yrs72
Popularity of the 'wojak' memer=0.616yrs70
Google searches for 'who is elon musk'r=0.6317yrs69
Average length of 3Blue1Brown YouTube videosr=0.787yrs66
Biomass power generated in Laosr=0.789yrs64
Dollar General's stock price (DG)r=0.6812yrs60
Google searches for 'n95 mask'r=0.6317yrs59
Total length of Mark Rober YouTube videosr=0.7411yrs54
Liquefied petroleum gas used in Sri Lankar=0.5237yrs54
Google searches for 'whatsapp'r=0.6612yrs48
Fortinet's stock price (FTNT)r=0.6612yrs47
Total length of Steve Mould's YouTube videosr=0.7213yrs43
Biomass power generated in Ukrainer=0.7413yrs42
Google searches for 'i have a headache'r=0.4818yrs38
Verisk Analytics' stock price (VRSK)r=0.6612yrs37
Average number of comments on LEMMiNO YouTube videosr=0.7410yrs33
Solar power generated in Burkina Fasor=0.7412yrs30
Mastercard's stock price (MA)r=0.6315yrs26
Total likes of Technology Connections YouTube videosr=0.767yrs23
Solar power generated in Mauritaniar=0.769yrs20
Applied Materials' stock price (AMAT)r=0.620yrs16
Total comments on Mark Rober YouTube videosr=0.7211yrs11
Biomass power generated in Kazakhstanr=0.759yrs9
Micron Technology's stock price (MU)r=0.5920yrs4
The average number of likes on 'Be Smart' science YouTube videosr=0.739yrs0
Biomass power generated in Chadr=0.7410yrs-2
TransDigm Group's stock price (TDG)r=0.6215yrs-6
Average number of comments on 'Be Smart' science YouTube videosr=0.729yrs-11
Geothermal power generated in Chinar=0.6817yrs-14
Nasdaq's stock price (NDAQ)r=0.5919yrs-16
Total length of MinuteEarth YouTube videosr=0.719yrs-22
Solar power generated in Yemenr=0.7112yrs-24
Ameren's stock price (AEE)r=0.5920yrs-26
Average length of SciShow Space YouTube videosr=0.728yrs-32
Solar power generated in Turkiyer=0.738yrs-35
Alphabet's stock price (GOOGL)r=0.5817yrs-37
Solar power generated in Belarusr=0.728yrs-46
Broadridge Financial Solutions' stock price (BR)r=0.6214yrs-47
Wind power generated in Dominican Republicr=0.6913yrs-56


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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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