Greening LA: Status Report on the 40th Anniversary of Earth Day

Acid rain was reduced by new federal regulations on sulfur emissions; the EPA got the lead out of gasoline; it took an international treaty to protect the Ozone layer. But a lot of environmental progress has been made on the local level. Then 15 years old, Andy Lipkis started the Tree People three months after the first Earth Day 40 years ago.  We speak with Lipkis and others about local efforts at protecting the environment and the quality of life in Southern California.