Woman with a hat handling a pollen trap.
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Pia Östensson is a biologist and a pollen expert. Every day this week, she empties the pollen trap. Credit: Ulla Engberg/Sveriges Radio
Close up on a pollen trap.
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The hole where the pollen gets into the trap is small. Credit: Ulla Engberg/Sveriges Radio
Birch tree catkins.
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Birch tree catkins releasing pollen. Not there yet. Credit: JANERIK HENRIKSSON / TT

Nature gears up for a full-on pollen season

5:06 min

The pollen season has been delayed this year because of a chilly spring, but is expected to come into full swing in southern Sweden over the next few weeks.

Every weekday, scientists around the country collect samples from twenty pollen traps to measure the amount of pollen in the air. Hazel, alder, birch, oak, grass and other tiny little substances that cause misery to the two million Swedish hay fever sufferers this time of year.

Radio Sweden met up with Pia Östensson, biologist and pollen expert at the Natural History Museum in Stockholm, as she was emptying a trap, to find out what we can expect from this year's pollen season and if is there such a thing as a pollen explosion?

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