National Public Radio: JOE PALCA, host: A new project dubbed the deep carbon observatory is just getting underway. It’s really more of a plan than an actual observatory at this point, but the idea is to catalogue and quantify all the carbon that’s under Earth’s surface. Why do scientists want this information and what might it be useful for? Well, here to answer that question is my guest. Robert Hazen is the principal investigator for the deep carbon observatory. He’s a senior staff scientist at the …