NEW YORK: Bidders will be able to buy fine art, a vacation in the Maldives, or an internship with designer Donna Karan and help the planet at the same time in Christie's annual Green Auction, which is expected reap millions for environmental causes. Proceeds from the third annual auction on April 11, which raised nearly a combined $5 million its first two years, will benefit four environmental charities -- Oceana, the Natural Resources Defense Council, the Central Park Conservancy and Conservation International.