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. One of the largest ...

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 ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. These conifers are not native and for the most part have not naturalized to ...

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 ...

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. Denali—no longer called ...

A solar oven is an easy, environmentally friendly way to cook food solely using the sun's power. It works by reflecting sunlight onto an enclosed surface. You can use a solar oven to heat water and ...

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

Synthetic clothing consists of a blend of different textiles. Synthetic materials have been around since the mid-twentieth century and have become the most used fibers over the past few decades.

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

Squid and octopuses are both brainy, soft-bodied sea dwellers with many arms, shade-shifting skin, and a tendency to spew ink into the paths of their predators. They're remarkably similar—closely ...

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 ...