Rabbits are adorable critters, but they're a lot of responsibility and require plenty of care. With their iconic ears, hoppy legs, and twitchy noses, it's understandable why plenty of people would ...

ULEV is an acronym for Ultra Low Emission Vehicle. ULEVs release emissions that are 50 percent cleaner than the current average year's models. ULEVs take the LEV, Low Emission Vehicle, standard a step ...

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 ...

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 ...

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 ...

Blythe Copeland is a writer, editor, and blogger who began working with Treehugger in 2008.

Rice is a staple food for half of the world’s population, providing more than one-fifth of the calories consumed by people. As a plant-based food, rice is indeed vegan. However, some vegans point to ...

Alex Davies is a technology journalist and the author of "Driven," an upcoming book about the self-driving car industry.

Katherine Gallagher is a writer and sustainability expert. She holds a B.A. in English Literature from Chapman University and a Sustainable Tourism certificate from the GSTC. Native to Southern ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama.

Russell McLendon is a science writer with expertise in the natural environment, humans, and wildlife. He holds degrees in journalism and environmental anthropology. More than half the U.S. population ...