The Environmental Protection Agency announced its approval last week of an air pollution plan for North Texas that will require more stringent smog tests for most vehicles and lower highway speed limits.

According to the Fort Worth Star-Telegram, the plan will be published in the Federal Register for a last round of public comment before final EPA adoption.
Clean air advocates are mostly happy with the plan, contending that it would reduce ozone smog, although some say it doesn't go far enough. However, the proposal is currently being challenged in court by businesses and consumers who say it will impose economic hardships on them.
The plan, approved by state environmental officials and Gov. George W. Bush in April, calls for lowering highway speed limits by 5 mph, requiring stricter smog tests for most vehicles and banning the use of heavy diesel equipment on summer mornings, the paper reported.