Top variables that correlate with Air quality in Charlotte, North Carolina

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Data source: Environmental Protection Agency
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Air quality in Charlotte, North Carolina correlates with...

Variable	Correlation	Years	Sys. Score
Hydopower energy generated in Greenland	r=0.95	23yrs	413
Fomento Econ's stock price (FMX)	r=0.92	22yrs	396
Biomass power generated in India	r=0.94	23yrs	382
Wind power generated in Taiwan	r=0.94	22yrs	380
U.S. direct investment abroad	r=0.93	22yrs	379
US production of butter	r=0.93	22yrs	378
US milk fat used to produce butter	r=0.93	22yrs	378
US milk fat used to produce yogurt	r=0.93	22yrs	378
US Wind Power Generation Capacity	r=0.9	23yrs	374
Google searches for 'tummy ache'	r=0.9	20yrs	372
The number of physical therapists in North Carolina	r=0.91	20yrs	372
The number of registered nurses in North Carolina	r=0.9	18yrs	369
GMO use in corn	r=0.93	24yrs	366
GMO use in cotton	r=0.92	23yrs	360
Google searches for 'i have a headache'	r=0.88	20yrs	360
Google searches for 'i have the flu'	r=0.88	20yrs	360
Colgate-Palmolive Company's stock price (CL)	r=0.88	22yrs	360
US household spending on fresh fruits	r=0.94	23yrs	360
US household spending on rented dwellings	r=0.94	23yrs	360
US household spending on healthcare	r=0.94	23yrs	360
Dominion Energy's stock price (D)	r=0.87	22yrs	358
Annual US household spending on telephone services	r=0.93	23yrs	358
US household spending on health insurance	r=0.93	23yrs	358
How professional-sounding SmarterEveryDay YouTube video titles are	r=0.92	17yrs	357
Annual US household spending on fresh fruits	r=0.91	23yrs	356
Annual US household spending on rented dwellings	r=0.91	23yrs	356
Annual US household spending on health insurance	r=0.91	23yrs	356
Annual US household spending on healthcare	r=0.9	23yrs	354
Wind power generated in Czechia	r=0.93	22yrs	349
US dairy skim solids used to produce yogurt, nonfrozen	r=0.94	22yrs	348
Ticket prices at North American movie theaters	r=0.89	22yrs	344
Popularity of the 'red pill blue pill' meme	r=0.87	18yrs	342
Economic output of Washington metro area	r=0.89	21yrs	340
Yearly Total Gross Income of US Farms	r=0.86	23yrs	340
Total employee count at Continental AG	r=0.86	24yrs	340
The number of clergy in North Carolina	r=0.89	20yrs	340
Biomass power generated in Papua New Guinea	r=0.92	22yrs	338
China's Annual Passenger Car Production	r=0.89	18yrs	338
Number of Public Library Members in the UK	r=0.92	12yrs	338
Global Net Sales for Walmart	r=0.9	17yrs	338
Average length of 3Blue1Brown YouTube videos	r=0.91	9yrs	338
US production of dry milk products (net)	r=0.92	22yrs	336
Adidas Group's Global Net Sales	r=0.87	23yrs	336
UK Service Retail Price Index	r=0.88	19yrs	336
Total length of PBS Space Time YouTube videos	r=0.9	9yrs	336
Annual Revenue of the Lego Group	r=0.86	20yrs	335
Global annual electricity generation	r=0.87	18yrs	334
Biomass power generated in Zambia	r=0.92	22yrs	328
Realty Income's stock price (O)	r=0.87	22yrs	328
GMO use in cotton in North Carolina	r=0.9	23yrs	327
US dairy skim solids used to produce butter	r=0.93	22yrs	326
Chunghwa Telecom Co.'s stock price (CHT)	r=0.88	20yrs	318
Wind power generated in Falkland Islands	r=0.91	22yrs	316
US production of cheese (other than cottage cheese)	r=0.91	22yrs	314
Google searches for 'i am tired'	r=0.86	20yrs	310
The number of lawyers in North Carolina	r=0.88	20yrs	310
Unilever's stock price (UL)	r=0.86	22yrs	307
Biomass power generated in Lithuania	r=0.92	21yrs	306
US production of whey products (net)	r=0.91	22yrs	304
Google searches for 'buy a house'	r=0.88	20yrs	300
The number of pharmacists in North Carolina	r=0.88	20yrs	300
Cognizant Technology Solutions' stock price (CTSH)	r=0.86	22yrs	297
Wind power generated in Tunisia	r=0.91	22yrs	296
US production of sour cream	r=0.91	22yrs	294
Google searches for 'how to make baby'	r=0.88	20yrs	290
The number of occupational therapists in North Carolina	r=0.89	20yrs	290
Novartis AG's stock price (NVS)	r=0.85	22yrs	286
US milk fat used to produce cheese (excluding cottage cheese)	r=0.91	22yrs	284
Wind power generated in Bulgaria	r=0.92	18yrs	284
Revenue of US Broadcasting Industry	r=0.86	17yrs	282
The number of respiratory therapists in North Carolina	r=0.89	20yrs	280
SAP SE's stock price (SAP)	r=0.85	22yrs	276
Google searches for 'scooby doo where are you'	r=0.86	20yrs	276
US dairy skim solids used to produce dry milk products	r=0.92	22yrs	274
Gasoline pumped in Micronesia	r=0.91	22yrs	273
The number of medical assistants in North Carolina	r=0.89	20yrs	270
US dairy skim solids used to produce cheese (other than cottage cheese)	r=0.91	22yrs	263
Solar power generated in Belgium	r=0.91	18yrs	262
The number of optometrists in North Carolina	r=0.86	20yrs	256
US dairy skim solids used to produce whey products	r=0.91	22yrs	253
Gasoline pumped in Timor-Leste	r=0.92	19yrs	252
The number of dentists in North Carolina	r=0.86	19yrs	246
Solar power generated in Greece	r=0.9	18yrs	240
The number of customer service representatives in North Carolina	r=0.86	20yrs	235
Petroluem consumption in Timor-Leste	r=0.9	19yrs	228
US average dairy skim-solid content of yogurt, nonfrozen	r=0.94	22yrs	226
The number of highway maintenance workers in North Carolina	r=0.85	20yrs	224
US Bottled Water Consumption per Person	r=0.9	24yrs	221
The number of OSHA specialists in North Carolina	r=0.86	19yrs	214
US average milk-fat content of yogurt, nonfrozen	r=0.91	22yrs	212
US average milk-fat content of dry milk products (net)	r=0.9	22yrs	200
Biomass power generated in Malawi	r=0.88	22yrs	192
US average dairy skim-solid content of fluid beverage milk	r=0.9	22yrs	190
Biomass power generated in Burma	r=0.9	17yrs	180
US milk fat used to produce whey products (net)	r=0.88	22yrs	170
Biomass power generated in Latvia	r=0.88	21yrs	170
The Coca-Cola Company's stock price (KO)	r=0.85	22yrs	165
Biomass power generated in Rwanda	r=0.87	22yrs	160
US production of yogurt, nonfrozen	r=0.87	22yrs	158
US milk fat used to produce sour cream	r=0.87	22yrs	148
Biomass power generated in Mozambique	r=0.86	22yrs	148

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^{What is Sys. Score?} 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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