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

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

Variable	Correlation	Years	Sys. Score
Wind power generated in Taiwan	r=0.96	22yrs	414
Chunghwa Telecom Co.'s stock price (CHT)	r=0.91	20yrs	392
Hydopower energy generated in Greenland	r=0.94	23yrs	382
US milk fat used to produce yogurt	r=0.95	22yrs	380
Wind power generated in Czechia	r=0.94	22yrs	380
U.S. direct investment abroad	r=0.93	22yrs	379
US production of butter	r=0.94	22yrs	379
US milk fat used to produce butter	r=0.94	22yrs	379
Ticket prices at North American movie theaters	r=0.91	22yrs	378
Yearly Total Gross Income of US Farms	r=0.92	23yrs	378
Google searches for 'i am tired'	r=0.91	20yrs	377
Number of Public Library Members in the UK	r=0.94	12yrs	370
Global Net Sales for Walmart	r=0.91	17yrs	370
The number of registered nurses in North Carolina	r=0.9	18yrs	369
UK Service Retail Price Index	r=0.9	19yrs	368
GMO use in corn	r=0.94	24yrs	367
Fomento Econ's stock price (FMX)	r=0.89	22yrs	362
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=0.87	20yrs	358
US household spending on fresh fruits	r=0.93	23yrs	358
How professional-sounding SmarterEveryDay YouTube video titles are	r=0.93	17yrs	358
GMO use in cotton in North Carolina	r=0.9	23yrs	357
Colgate-Palmolive Company's stock price (CL)	r=0.86	22yrs	357
Annual US household spending on telephone services	r=0.92	23yrs	357
Annual US household spending on fresh fruits	r=0.91	23yrs	356
US household spending on rented dwellings	r=0.91	23yrs	356
Annual US household spending on processed vegetables	r=0.9	23yrs	354
Annual US household spending on utilities	r=0.9	23yrs	354
Annual US household spending on electricity	r=0.9	23yrs	354
US household spending on healthcare	r=0.9	23yrs	354
Biomass power generated in India	r=0.93	23yrs	350
US dairy skim solids used to produce yogurt, nonfrozen	r=0.95	22yrs	349
Popularity of the 'red pill blue pill' meme	r=0.89	18yrs	345
Average length of PBS Space Time YouTube videos	r=0.94	9yrs	342
US Wind Power Generation Capacity	r=0.89	23yrs	342
The number of lawyers in North Carolina	r=0.89	20yrs	341
The number of pharmacists in North Carolina	r=0.89	20yrs	341
Economic output of Washington metro area	r=0.89	21yrs	340
Wind power generated in Falkland Islands	r=0.93	22yrs	339
Average number of comments on Technology Connections YouTube videos	r=0.91	9yrs	338
US dairy skim solids used to produce butter	r=0.94	22yrs	338
Adidas Group's Global Net Sales	r=0.86	23yrs	335
Annual Revenue of the Lego Group	r=0.86	20yrs	335
Global annual electricity generation	r=0.86	18yrs	333
China's Annual Passenger Car Production	r=0.86	18yrs	333
Organic Food Sales Volume in the United States	r=0.9	13yrs	331
Biomass power generated in Rwanda	r=0.92	22yrs	328
US production of yogurt, nonfrozen	r=0.92	22yrs	326
Enbridge's stock price (ENB)	r=0.85	22yrs	326
Annual US household spending on fruits and vegetables	r=0.9	23yrs	324
Annual US household spending on property taxes	r=0.9	23yrs	324
Biomass power generated in Zambia	r=0.92	22yrs	318
US production of sour cream	r=0.92	22yrs	316
Cognizant Technology Solutions' stock price (CTSH)	r=0.85	22yrs	316
Google searches for 'tummy ache'	r=0.89	20yrs	311
The number of clergy in North Carolina	r=0.89	20yrs	310
US milk fat used to produce whey products (net)	r=0.91	22yrs	304
Jet fuel used in Sao Tome and Principe	r=0.92	22yrs	304
Google searches for 'who is the doctor'	r=0.89	20yrs	301
The number of physical therapists in North Carolina	r=0.89	20yrs	300
GMO use in corn	r=0.88	24yrs	298
Wind power generated in Bulgaria	r=0.9	18yrs	290
Google searches for 'highest paying jobs'	r=0.87	20yrs	288
The number of optometrists in North Carolina	r=0.86	20yrs	286
Gasoline pumped in Timor-Leste	r=0.91	19yrs	280
Google searches for 'i am dizzy'	r=0.86	20yrs	276
The number of dental assistants in North Carolina	r=0.87	20yrs	276
US average milk-fat content of yogurt, nonfrozen	r=0.94	22yrs	276
Google searches for 'how to make baby'	r=0.86	20yrs	266
The number of medical assistants in North Carolina	r=0.87	20yrs	266
US average dairy skim-solid content of fluid beverage milk	r=0.92	22yrs	263
The number of cartographers in North Carolina	r=0.85	20yrs	255
The number of public relations specialists in North Carolina	r=0.86	20yrs	245
US production of whey products (net)	r=0.9	22yrs	243
Biomass power generated in Papua New Guinea	r=0.88	22yrs	242
The number of physician assistants in North Carolina	r=0.86	20yrs	235
US milk fat used to produce sour cream	r=0.9	22yrs	233
Gasoline pumped in Micronesia	r=0.9	22yrs	232
US Bottled Water Consumption per Person	r=0.88	24yrs	228
The number of occupational therapists in North Carolina	r=0.86	20yrs	225
US production of cheese (other than cottage cheese)	r=0.89	22yrs	222
Biomass power generated in Slovenia	r=0.87	23yrs	221
The number of radiation therapists in North Carolina	r=0.86	20yrs	215
US milk fat used to produce cheese (excluding cottage cheese)	r=0.89	22yrs	212
Biomass power generated in Lithuania	r=0.86	21yrs	208
The number of respiratory therapists in North Carolina	r=0.86	20yrs	205
The Coca-Cola Company's stock price (KO)	r=0.85	22yrs	205
US dairy skim solids used to produce whey products	r=0.9	22yrs	202
Biomass power generated in Malawi	r=0.86	22yrs	198
The number of pharmacy technicians in North Carolina	r=0.86	20yrs	195
US dairy skim solids used to produce sour cream	r=0.9	22yrs	192
Hydopower energy generated in Sierra Leone	r=0.86	22yrs	188
US production of dry milk products (net)	r=0.88	22yrs	180
Wind power generated in Tunisia	r=0.86	22yrs	178
US dairy skim solids used to produce cheese (other than cottage cheese)	r=0.89	22yrs	170
Gasoline pumped in Cook Islands	r=0.88	22yrs	168
US dairy skim solids used to produce dry milk products	r=0.88	22yrs	158
Jet fuel used in Samoa	r=0.88	22yrs	158
Muenster cheese consumption	r=0.9	27yrs	146
Jet fuel used in Timor-Leste	r=0.88	19yrs	146

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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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