Lawsuit claims school bus pollution

Two environmental groups filed a lawsuit this week in San Francisco, claiming some school buses fill with cancer-causing levels of diesel exhaust fumes.

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<p><a href="http://www.physorg.com/news65885378.html">Lawsuit claims school bus pollution</a></p> <p>Two environmental groups filed a lawsuit this week in San Francisco, claiming some school buses fill with cancer-causing levels of diesel exhaust fumes. </p>