April 22 marks the 40th anniversary of the first Earth Day celebration. To mark the event, we look at some modern, sustainably designed homes featured in the new book "New Green Homes" by Spanish architects Sergi Costa Duran, Ethel Baraona Pohl and Liliana Bollini and published by Collins Design. Each of the homes are specifically adapted to their climates using some of the latest energy-saving technology. They may conserve energy but there's no skimping on lifestyle. And the setting alone of many of these homes will drop a few jaws.
Gallery: Stunning Green Homes of the World