The average car on American roads is now 12.8 years old, a record high, according to S&P Global Mobility’s 2025 analysis. That number has climbed steadily for more than a decade, up from roughly 10 ...
Studebaker car with a Wisconsin front license plate by RAUL RODRIGUEZ via iStock for WMNF. Ann E. Carlson, University of California, Los Angeles Cars on the road today are 99% cleaner than they were ...
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How California’s war on smog and its ambitious car pollution rules made everyone’s air cleaner
Cars on the road today are 99% cleaner than they were in 1970. Air quality in the United States is much, much better as a result. In Los Angeles, where I live, lead levels in the air were 50 times ...
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