NEW YORK (AP).- A day of golfing and lunch with former president Bill Clinton, flying with Harrison Ford on his private aircraft and sailing off the coast of Maine with the Rockefellers are just a few of the celebrity and luxury items being offered at an auction to benefit four leading environmental organizations. The online component of the second annual Bid to Save the Earth auction was launched Thursday and runs through April 7. A live companion sale is scheduled for March 29 at Christie’s auction house. The event will benefit the Central Park Conservancy, Conservation International, the Natural Resources Defense Council and Oceana. It raised $2.4 million for the four organizations last year. “It’s a fabulous opportunity to raise awareness about nonprofit organizations that are doing some of the most innovative and important work,” said Sue Rockefeller, the chair of Oceana’s ocean council, who with her husband, David Roc