Even as we all become more environmentally conscious, we often pay little mind to the air we’re breathing.
Turns out, a state famed for its outdoorsy citizens and breathtaking natural features has the very worst air quality of all.
The American Lung Association assessed air quality across the country by analysing the amount of ozone in the air, the short-term particle pollution, and the amount of particle pollution evident in the area year-round.
Publication Eat This, Not That aggregated the findings by counting the number of times places in the states appeared on those three lists.
Turns out, California is the most polluted state in America.
Californian cities occupied 27 of the top 75 most polluted cities nationwide.
Arizona is the second most polluted state, the researchers found, while Texas and Oregon occupied the third and fourth spots respectively. Alaska took fifth spot, and ranked first in terms of the amount of particle pollution in the air.
The findings come a day after Earth Day, an annual event demonstrating support for environmental protection.
US president Joe Biden promised to cut US emissions in half at a summit connected to the event yesterday - a tall order perhaps, given the country is the second biggest emitter of greenhouse gases annually, second to China.