Succulents on the roof?

Green buildings seem to be the latest in development among environmentally-minded folk--and green rooftops are part of the new environmental trend. Hardier plants are recommended for rooftops, and succulents are some of the most resilient and hardy plants around. Succulents are recommended for green roofs.
Weight is the primary issue of concern, so if considering building a succulent rooftop, state this clearly to contractors and builders because they will have to build accordingly. All weight issues aside, their presence can lower both heating and cooling costs, and serve to protect a house from fire and leaks. For more info, read: Crazy About Cacti and Succulents.