Dirt road

Grover Beach Mayor Debbie Peterson feels that unpaved roads like this one in south San Luis Obispo County contribute to airborne particulate pollution and that vehicles on the Oceano Dunes are not the only culprit behind the dust that sometimes exceeds state  air-quality standards.

( Brian van der Brug / Los Angeles Times )

Grover Beach Mayor Debbie Peterson feels that unpaved roads like this one in south San Luis Obispo County contribute to airborne particulate pollution and that vehicles on the Oceano Dunes are not the only culprit behind the dust that sometimes exceeds state air-quality standards.

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