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Tag: trees

Trees in cities are not always good for air quality

A common argument for more trees in cities is that they improve air quality. A new Norwegian study suggests that trees can also negatively affect air quality.

When is the best time to prune bushes and trees?

Summer is not the time to prune bushes and trees, according to researchers. Hobby gardeners often receive different advice.

Is it true that trees talk to each other?

A fantastic idea and a popular science book that has sold millions of copies claims that they do. This is laying it on too thick, according to Norwegian biology professor, who warns against 'disneyfication' of research results.

The world’s oldest tree has broken

Heavy snow has broken the top of the 9,500 year old spruce Old Tjikko in Sweden.

A Viking queen was buried with a bucket of these wild apples. Now researchers worry that their special genetic makeup will disappear

Most people who have tasted crab apples think they are inedible, but researchers still think they are important.

World's oldest tree still growing near the Norwegian-Swedish border

The nearly 10 000-year-old spruce tree is only five metres tall, but it began to grow just after the last ice age ended.

How do trees know when to awake in spring?

Trees can see, feel and calculate time. Norwegian researchers have helped reveal another of trees’ tricks for surviving frigid winters.

Life extinguishes in lonesome oaks

Hundreds of insects, lichens and fungi live in the hollow spaces of centuries-old Norwegian oaks which are the verge of disappearing.

OPINION: The Christmas tree's carbon footprint

Trees store carbon dioxide. How bad is it really to chop down a spruce tree and put it in the living room for Christmas?

Norwegian woods triple since WW2

Norway now has three times as much forest as it did before World War Two. The volume of growth this year will be the equivalent of nearly 100 sacks of firewood per Norwegian.

The oldest spruce in Northern Europe is 532 years old

Northern Europe’s oldest spruce is still growing strong in a Norwegian forest. It outdates Martin Luther and was a young tree before Columbus reached the Americas.

How long before a tree rots away?

A fallen pine on the forest floor can take several hundred years longer to decompose than a spruce.

Factoring sheep into climate calculations?

Tree rings in many regions could be more affected by hungry herbivores than by temperatures. This should be taken into account in calculations of historic climate.