Restoring the climate requires that we switch to carbon-free energy by 2030-2050, as described by Stanford’s Prof. Mark Z. Jacobson, and let the ocean continue absorbing the carbon dioxide we’ve emitted.

In 1961, President Kennedy declared: “We will send a man to the moon and bring him back safely by the end of the decade.”  At the time we had just sent a man into space for 15 minutes. We did not have the rockets, the navigation or the life support systems for a moon trip and most people, including my parents, thought it was complete folly.  Seven years later we had developed and demonstrated the technology — ahead of schedule. We had a clear ambitious…