What are the tallest trees in the world? These 10 skyscraping superstars are some of the stalwart examples of their species.

Here are maps showing locations of broad types of forest cover by tree types according to frequency of occurrence in the native range.

Two species of sloths are endangered according to the IUCN Red List. Learn about conservation efforts and how we can help restore sloth populations.

Want to turn your bathroom into an indoor oasis? From ferns to orchids, here are 10 shower plants that want to live in your bathroom.

Learn how to identify the yellow poplar tree, including facts about its habit, range, management, and more.

There are 145 National Forests in 41 states in the United States. Discover each of them, state-by-state.

Cactus leather can be used for handbags, shoes, furniture, and more. We look at its environmental impact and how it compares to cotton and leather.

Cupro is a byproduct of cotton and a vegan alternative to silk. Does that mean it's a sustainable fabric? Find out exactly how this material is made.

Most Americans live in urban areas, forming huge hot spots of energy consumption. But while rural residents use less energy overall, cities are often slicker ab ...

Learn how slow fashion got started, how its meaning has evolved over the years, and how you can incorporate its practices into your life.

Explore Mammoth Cave National Park with our list of 10 mind-blowing facts, including its unique karst topography, springs, caves, and rich history.

There are thousands of lizard species, and many are critically endangered. Meet the Fiji crested iguana and other rare and beautiful reptiles.