How GM Invented Planned Obsolescence It all started with a struggling auto company in the 20s.

Find out what nitrogen oxides (NOx) are, why they are a serious environmental concern, and what role they play in the Volkswagen diesel engine scandal.

Learn where to recycle milk cartons and how to do it correctly, whether the carton should be flattened or not, and what to do with the plastic caps.

Pine trees are one of the most common coniferous species in North America. Learn how to identify the types found in the United States and Canada.

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.

Friends and enemies in the animal world tend to be pretty clear-cut. But as these unlikely pairs show, even Mother Nature doesn't set things in stone.

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 ...

How the Planets Got Their Names From Mercury to Pluto, why did these gods get the ultimate honor of the cosmos?

Pinyon pine is a widely distributed pine that grows in the Intermountain region of western North America. It is a major indicator tree in the pinyon-juniper life zone. P. edulis is a short and ...

Cellulose tape is a transparent adhesive tape that happens to be biodegradable too. It is difficult to find, especially in the US. Almost all transparent tape sold here is made of acetate. One ...

Keeping your tires properly inflated is one of the simple things you can do to lower your carbon footprint and fuel costs, and also stay safe.