To compete in a science fair, San Francisco public schoolstudents went downtown to ask real-world tech workers to evaluate their projects. KCBS Radio’s Jenna Lane reports on their ideas around the theme of sustainability.

<p>To compete in a science fair, San Francisco public schoolstudents went downtown to ask real-world tech workers to evaluate their projects.&nbsp;KCBS Radio’s Jenna Lane reports on their ideas around the theme of sustainability.</p>

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