Pia Östensson, a biologist and pollen expert at Stockholm's Natural History museum, explains why there is so much aspen fluff this year and why it is not related to recent wildfires.

A growing die off of native Western Red Cedar trees is becoming visible right across East Vancouver Island now. Experts say its a symptom of climate change and as Skye Ryan reports, its changing the forests we've come to know across this region.

The worst-hit areas appear to be established neighborhoods with older spruce trees, especially in Turnagain and Spenard.

Kettle ponds in Denali National Park contain less water this spring than in previous years, due to low snowfall and permafrost thaw. Shrubs are replacing grasses as the lakes dry.

One of B.C.'s most abundant plants is in trouble: patches of hardy salal plants are turning up brown, crispy and dying.

Hikers across Vancouver Island say they've been finding entire forests with dying salal. No one knows why it's dying but the ramifications could be serious.

Spring blossoms, dusty streets, distant fires and a lack of rain combine to create hazardous respiratory conditions.

Salal bushes observed to be very dry and dying in British Columbia.

Pollen from birch trees was carried along with dust from the Sahara Desert on strong winds that originated in Eastern Europe.

the Beaufort Picnic Area appears to consist of stream-origin alluvial cobbles, pebbles, and perhaps sand, and so not well consolidated, thus perhaps making these trees relatively vulnerable to wind. The snapped-off trees, however, indicate the unusually high intensity of this particular windstorm.

A sharp decline in chestnut trees caused by a parasitic fungus in Russia's southern Krasnodar region is threatening the area's honey production, according to local beekeepers and scientists.

The closures of the campgrounds, facing the threat of falling trees, likely will last through summer, the state parks division said.

Warm temperatures are rapidly melting snow and creating ice, which creates difficult conditions for dog mushers. Migratory birds are arriving early, and a mosquito emerged months early. Small owls dead around the Goldstream Valley that looked unusually thin.

Alder catkins (the pollen-rich flowers on alder trees) haven't reached their peak yet, but there are a lot of them. There can be four to five million pollen particles in a single catkin.

Warmer than normal temperatures in Anchorage may be causing willows (genus Salix) to bud early.

Willows budding about a month early 30 miles above the Arctic Circle.

Warm temperatures break 30 year record.