How do you make a movie about changes to the ocean's chemistry? See here:

Sven Huseby and wife Barbara Ettinger have made a new documentary about ocean acidification, the other offspring (along with global warming) of the rising concentration of carbon dioxide in our atmosphere (and the one that can't be covered up with a good batch of geoengineering.) As a staffer at the marine environmental group Oceana once told me: "If the ocean goes, we're all toast."

A Sea Change premieres outside the film festival circuit this Sunday, September 13, at the American Museum of Natural History in New York City at 4 P.M. (an event that is free with museum admission and open to the public, though seats are limited) and then airs on the Planet Green cable channel starting September 26. Maybe another movie will help convince any remaining doubters that action needs to be taken to address the human-generated greenhouse gas emissions that are dramatically changing Earth's climate—and the chemical balance of the waters that cover more than two thirds of our planet.