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Tailpipe with thick smoke coming out of it

Sick of Soot

The Union of Concerned Scientists promotes a cleanup strategy for diesel vehicles that includes strict emission standards, incentives for cleaning up existing engines, and replacing or retrofitting older school buses.
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Satellite mobile hanging from a ceiling

A Military Intelligence Failure?

UCS is working for a safer world by eliminating risks of nuclear arsenals and nuclear terrorism, improving nuclear plant safety, preventing deployment of anti-satellite and space-based weapons, and enhancing international dialogue on security issues.
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A unitary medium-range ballistic missile target launches from the Pacific missile range facility

National Missile Defense Deployment in 2004

The ballistic missile defense system that the United States will deploy later this year will have no demonstrated defensive capability and will be ineffective against a real attack by long-range ballistic missiles.
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Climate Control

California is focusing on the largest source of heat-trapping emissions in the state—motor vehicles.
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The Diesel Dilemma

Diesel is becoming cleaner, but gasoline vehicles are more cost-effective than diesel for reducing oil use and lowering global warming pollution.