Treehugger / Hilary Allison Studying leaf shape and the arrangement of leaves on a stem is the most common way of identifying a tree in the field during the growing season. The novice taxonomist ...

Tree root systems are seldom on the minds of forest owners, tree planters, and general dendrophiles. Roots are rarely exposed, and so misconceptions about how they grow and function can influence ...

In an era when residential energy use accounts for a fifth of U.S. emissions, these off-the-grid communities are carving their own sustainable paths.

Treehugger/ Alexandra Cristina Nakamura Believe it or not, twigs can be used to identify a tree as well. This is a good thing because they are about all that remains of most trees during the ...

Wood is a highly ordered arrangement of living, dying and dead cells. Here is a briefing on how tree cells grow and function structurally.

Chao Yen / Flickr / CC BY-ND 2.0 Until 2013, Methuselah, an ancient bristlecone pine was the oldest known non-clonal organism on Earth. Methuselah was 4,789 years old when examined in 1957, with ...

Oregon Department of Forestry / Flickr / CC BY 2.0 Hybrid poplar is extremely beneficial in ways not directly profitable. Property owners can stabilize stream banks and agricultural lands by ...

Contrary to popular belief, geckos don’t have “sticky” toes, as if covered with glue. They cling with incredible ease thanks to nanoscale hairs, known as setae, that line every toe in huge ...

The three pillars of sustainability are fundamental in guiding many organizations' policies today, including the United Nations and the EPA.

From New York's Eternal Flame Falls to Ethiopia's Erta Ale, these naturally occurring eternal flames have been burning for decades or centuries.

The taiga, also known as the boreal forest, is the largest land biome on Earth, and the animals that inhabit it are uniquely adapted to its cold climate. It wraps around the planet at high ...

Distribution of global forest area. FAO The boreal represents nearly 30% of the world's forest cover. Canada contains 9% of the world's forests. 77% of Canadian forests are in the boreal zone. The ...