… and most important measure, in accordance with the German Environment Agency's guidelines of 15 October 2020. The guidelines state that ventilation should take place every 20 minutes for about 3-5 …

… simplest and most effective way to remove viruses from the air in classrooms. Our guidelines are designed to help schools ventilate properly and as effectively as …

… here module C5: Restoration of small water bodies within urban areas Funding guideline for the rewetting of ecologically significant peatlands ( 1000 peatlands ) … here module C5: Restoration of small water bodies within urban areas Funding guideline for the rewetting of ecologically significant peatlands ( 1000 peatlands ) …