Earth Log

September 25, 2015 12:17 PM

Air-quality scientist David Lighthall, 61, dies

Influenced more protective air rules for Valley

He was known for curiosity, gentle spirit

Earth Log

Mark Grossi's dispatches from the Valley battle with air quality and water use

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About Mark Grossi


Mark Grossi has the pulse of the San Joaquin Valley ecosystem, writing since 1993 about subjects such as the region's notorious air quality, the restoration of the San Joaquin River and unhealthy drinking water in rural towns. Twitter: @markgrossi Mark retired from The Bee in October 2015.

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