Los Angeles ? He showed up at the Oscars in a hybrid car and lobbied loudly for worldwide access to clean water.

Now actor-activist Leonardo DiCaprio is making a documentary about global environmental issues.

He has started production on “11th Hour,” a feature-length film that explores global warming and offers solutions for restoring the planet’s ecosystems, publicist Keleigh Thomas said Monday.

The film is scheduled to be released in fall 2006, Thomas said.