Sienna Miller's Workout For The Environment

It seems that everyone wants to lose weight. There are fad diets, fitness trends, and high-profile celebrity trainers that try to guarantee beauty. But when it comes to the environment, Sienna Miller has the corner on the fitness market.

Miller is in cahoots with a new program that helps people lose a different kind of weight… the carbon kind. “My CO2” is designed as a personal regiment to aid in reducing carbon emissions.

There’s even an online guru called the Carbon Coach to fill the role of personal trainer. He's designed to train people in changing their lifestyle in order to reduce their carbon footprint.

And Sienna has fellow celebrities helping her out. Joining her in the battle for environmental fitness are Josh Hartnett and Heather Graham. Graham’s advice? "Think of it as a new workout, a simple, straightforward workout to save the planet."

Enjoy the pictures of Sienna this past week at the Kabaret Club in London (June 3), on the set of 'The Edge of Love' (May 30) and at the Kensington Roof Relaunch Party (May 26).