Across the United States, the rules for checking tailpipe pollution are quietly shifting, even as climate targets grow more ambitious and electric vehicles grab headlines. States are carving out ...

Depending on where you live in the United States, emissions testing of old cars may or may not even be a thing. There are 28 states where at least some (though not necessarily all) are required to ...

TOKYO -- Japan's Ministry of Transportation on Saturday began considering changing the country's auto emissions tests after Volkswagen was caught cheating on diesel exhaust tests for cars sold in the ...

TOKYO -- The government of Japanese Prime Minister Yoshihide Suga is launching another initiative in his quest for net-zero greenhouse gas emissions by 2050: manufacturing and running cars on ...