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A motif from the calendar "Energy - renewable - biomass" by Flori0: The CALVENDO editions are a strictly limited number of hand-picked calendar...

A motif from the calendar "Energy - renewable - biomass" by Flori0: Renewable energy includes bioenergy, geothermal energy, hydropower, marine...

A motif from the calendar "Nature on our doorstep" by Sabine Löwer: There are many little wonders that we can discover right on our doorstep if...

... to pussy willows A motif from the calendar "Nature on our doorstep" by Sabine Löwer: There are many little wonders that we can discover rig...