Because of climate change and mild temperatures, pollen counts are starting earlier and earlier in Germany. Hazel pollen, which began flying in some regions in December, has actually already passed its peak.
Alder pollen is "clearly the number one allergen in the air" for the coming days. Experts are calling for allergy-friendly urban greening in Berlin and other German cities. It does not make sense to continue planting trees to whose pollen people in Germany are allergic, says Torsten Zuberbier.