A passive solar-heated home needs no solar panels to heat or cool it. Rather, the energy used to heat and cool a house comes directly from the sun through skylights and windows. Some of that energy is ...

A solar tree is a structure resembling a tree that generates solar energy using photovoltaic (PV) panels. It employs principles of biomimicry, using a natural system—in this case the form of a tree—to ...

Sidney Stevens is a writer and editor for magazines, websites, and books, with a focus on health and environmental issues. Some 400 billion birds share the planet with us, each with its own abundant ...

Matt Hickman is an associate editor at The Architect’s Newspaper. His writing has been featured in Curbed, Apartment Therapy, URBAN-X, and more. The longest bridge in the world, in any category, is ...

Solar air conditioning is any air conditioning powered by the sun's energy. Solar air conditioners have no emissions and supply their own energy, so customers can lessen their carbon footprint and ...

Lisa has been writing for People Inc. since 2005 and works with a wide range of educational publishers, conservation nonprofits, and research institutions. She has written for science museums, nature ...