He said he had considerably more optimism about this project than about shorter-term efforts to reduce automotive emissions.

Measures to meet these targets include tighter automotive emissions standards, and requirements for renewable energy as a proportion of electricity production.

The problem is likely to continue, he said, until industrial and automotive emissions are reduced.

The Clean Air Act (1970) set new standards for automotive emissions.

Last year, California passed the nation's first legislation aimed at limiting automotive emissions of greenhouse gases, and a legal challenge is seen as a strong possibility.

Automakers on Wednesday attacked a California plan to regulate automotive emissions of global warming gases.

The California Assembly passed a bill on Wednesday that would set the first standards in the nation for regulating automotive emissions of a greenhouse gas.

In California, the suit is also seen as an effort to stave off challenges to the state's plan to regulate automotive emissions of greenhouse gases.

"I see here she was assigned to a story on automotive emissions."

Also includes simple tips for improving fuel economy and reducing automotive emissions.