Every year, the Christmas tree debate returns: Is it better to cut down a natural tree for a short-lived holiday display, or use an artificial one made from non-recyclable plastic? The answer is ...

Planting more trees can help cool the planet and reduce fire risk—but where they are planted matters. According to UC ...

Fall leaf color and climate change, urban trees, heat islands and downtown honeybees.

More trees will cool the climate and suppress fires, but mainly if planted in the tropics, according to a new UC Riverside ...

Forests protect against avalanches, but not every forest is equally effective. Thanks to almost 50 years of observations at the Stillberg afforestation site, SLF researchers have now gained insight ...

Douglas-firs ( Pseudotsuga menziesii) are Oregon's most common trees, but the tree that's ablaze, known as the Doerner Fir, ...

Regular cycles of light and darkness shape all living beings. Yet when unusual events like a solar eclipse occur, the natural ...

Research shows delayed effects of Oregon’s Labor Day fires have killed trees that survived the initial blazes.

On this week's episode of the Best of Quirks & Quarks with Bob McDonald: a tree that harnesses lightning, how pooping boosts ...

Trees are abundant in the Pacific Northwest, and as the leaves are turning, we're treated to a beautiful display of red and gold. Why do they change color?