What’s exciting about the projects in this book is that as they face the sun, they suggest new styles of building that are, deeply, green. Rather than greenwashing, setting solar panels on the roof or wind turbines in the lawn of an otherwise conventional structure, these buildings respond fundamentally to solar patterns. Some distinctive styles emerge. Buildings in warm, sunny climates tend to have long roof overhangs to shield sunlight and heat, and narrow spaces to provide cross-ventilation. Their roofs can be faceted and tilted to respond to the sun’s location and height at specific times of the day. And buildings in cold, dark climates tend to have compact masses and heavy shells to conserve heat, and very precisely located windows to capture direct sunlight when possible. Glass skyscrapers are often veiled with metal screens and deflectors that shield direct sunlight and allow a filtered, glare-free light inside. It’s a highly pragmatic system of calculating heat and energy loads that determines if a building is zero-energy, but one that can inspire spectacular effects.