KTVU, KPIX, KGO and KNTV have rejected ads from a group that wants to legalize marijuana and tax the drug to help reduce the state’s deficit. KRON, which is in bankruptcy, and some cable stations agreed to air the 30-second spot by the Marijuana Policy Project. It begins airing today.

Josh Richman of BANG-EB talked to station executives about their decisions.

The Field Poll in April found 56 percent of California voters favor legalizing marijuana. A few days later, Gov. Arnold Schwarzenegger said “it’s time for a debate” over legalization.