Turning Earth into Mars?

Find more Earth Focus content at https://www.linktv.org/earthfocus "We are Marsifying Earth," says distinguished marine Biologist Dr. Sylvia Earle. "We are increasing the amount of carbon dioxide in our atmosphere... We are undermining the integrity of systems that yield what we need to live. What is more important than that? Our economy, our health, our security, or being alive? It starts with being alive." Dr. Earle explains why the ocean is a life support system for the planet -- but its becoming more acidic. "Most of the oxygen that we breathe comes from the ocean," she says. "So we should take care of it as if our lives depend on it."