Allergy season can be miserable for tens of millions of Americans when trees, grass, and other pollens cause runny noses, ...

A new study from Umeå University has revealed that trees' circadian clocks guide their growth and the timing of seasonal ...

Scientists discovered trees use a biological clock to time growth. Changing this clock helps trees grow better and adapt to new environments.

Climate change is causing record-breaking pollen counts due to longer, warmer seasons and increased carbon dioxide. Higher ...

While warm temperatures will lead to increased pollen counts over a longer period in some areas of the country, there is some ...

Among the oaks, white, red and bur oak all stand tall as ecological heavyweights. Their acorns feed wildlife, their canopies ...

It's certainly not the warmer temperatures, but the seasonal allergies they suffer through when all the trees and plants explode, sending massive amounts of pollen grains into the air. It might ...

Forestry Minister Mary Creagh said: “Our precious street trees improve air quality, mark the changing seasons and provide us with peace, shade and joy. Their value simply cannot be overstated.

Drought conditions in most of California will worsen air quality and increase airborne particulates like dust and pollen.