Being naked is an eye-catcher for everyone. So it’s no wonder that actress Emma Watson agreed to appear naked for a real book that aims to raise awareness of environmental problems.

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Environmentally conscious Emma posed nude for New York photographer James Houston’s new project “Natural Beauty” – a collection of portraits of environmentally conscious celebrities.

The 22-year-old Harry Potter star is seen naked and wet in a series of artistic but provocative images, with nothing but a few flowers and careful cleavage for modesty.

Emma first posted this image from her Twitter account @EmWatson and told her 6 million followers: “My boyfriend is supporting GlobalGreenUSA with his book Natural Beauty. It’s out now. : ) X”

Other celebrities involved in Houston’s campaign include Christy Turlington, Adrian Grenier, Brooke Shields, Arizona Muse and Elle Macpherson.

“This project combines my long-standing interest in the human form and my passion for nature,” said Houston. “‘Natural Beauty’ was created to celebrate the beauty of nature and to highlight what we still have and what we have lost.”

He added: “I hope to raise environmental awareness among younger audiences through this project.”

Proceeds from “Natural Beauty” benefit environmental initiatives from Global Green USA. You can see a trailer for the project here.

Determined to shed her squeaky-clean “Potter” image, Emma Watson will go on a crime spree as a fame-obsessed teenager in Sophia Coppola’s new film “The Bling Ring,” out later this year.

Check out the trailer below.