Analytical chemist Marie Swita tests biofuel samples to measure purity. (IMAGE)

DOE/Pacific Northwest National Laboratory

Analytical chemist Marie Swita tests biofuel samples to measure purity.

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Analytical chemist Marie Swita tests biofuel samples to measure purity.

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(Photo by Andrea Starr | Pacific Northwest National Laboratory)

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(Photo by Andrea Starr | Pacific Northwest National Laboratory)

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