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Länk - Mer solfläckar nu än på åtminstone tusen år
Scientists based at the Institute for Astronomy in Zurich used ice cores from Greenland to construct a picture of our star's activity in the past. They say that over the last century the number of sunspots rose at the same time that the Earth's climate became steadily warmer. This trend is being amplified by gases from fossil fuel burning, they argue.
Läs mer: BBC NEWS | Science/Nature | Sunspots reaching 1,000-year high
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