We know earth is heating up. But now scientists at NASA’s Jet Propulsion Laboratory in Pasadena are on a mission beginning late tonight to find out by how much. 

KCBS Radio's Karen Adams reports.

<p>We know earth is heating up. But now scientists at NASA’s Jet Propulsion Laboratory in Pasadena are on a mission beginning late tonight to find out by how much. </p>
<p>KCBS Radio's Karen Adams reports.</p>

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