It's only late February but already spring has sprung in Stockholm, according to the definition by Sweden's national weather service.
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.
An unusually dry, hot summer means Sweden will see smaller yields of crops like wheat, barley and oats.
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