(Reuters) - A woman observes an art piece called "Tide" by Darren Almond during the press preview of "Earth: Art of a changing world" at the Royal Academy of Art in London December 1, 2009. The exhibition of new and recent works by a broad range of contemporary artists across a wide range of media aims to reflect the impact of climate change. REUTERS/Andrew Winning (BRITAIN ENTERTAINMENT SOCIETY) ENVIRONMENT)