It has also violated pollution laws and emission limits more than 450 times.
That treaty, which was not ratified by the United States, sets emission limits for developed nations.
Corporate America is by no means unanimous in embracing the idea of emission limits.
But suppose that Congress were to mandate gradually tightening emission limits, starting two or three years from now.
EARLIER this month Germany's carmakers were hit by new emission limits proposed by the European Commission.
Many countries are reluctant to commit themselves to tough emission limits, fearing that doing so will hurt economic growth.
Dr. Lindzen has obliged by assuring them that they are running no risks by refusing to enact emission limits.
* Mr Obama has also put in motion a change in rules to allow states to set stricter car emission limits.
McWane plants have been found in violation of pollution rules and emission limits at least 450 times since 1995, records show.
T&E's diesel expert, Jos Dings, said: "Our latest report demonstrated that almost 90% of diesel vehicles didn't meet emission limits when they drive on the road.
Unless other countries adopt similar emission limits, the senators warned, jobs will migrate overseas and foreign manufacturers will have a decided cost advantage.
