Actor Leonardo DiCaprio interviewed President Clinton on the topic of global warming Friday, for an Earth Day special that will air on April 22 on ABC. Clinton discussed his policy on climate change and efforts to make the White House more eco-friendly, according to White House spokesperson Jake Siewert. “I thought it was an interesting, innovative opportunity for us to take a very important subject and, with someone like Leonardo DiCaprio, be able to direct it to a young audience,” said Phyllis McGrady, executive producer of ABC News. DiCaprio is chair and emcee of the main Earth Day 2000 event to be held on the National Mall in Washington, D.C.