inversed-umbrella-water-collecting-system-nature-illustration-by-frits-ahlefeldt

Inversed umbrella with green plants, working as a water purification system

Drawing by Frits Ahlefeldt

Published by

Frits Ahlefeldt

Founder of Hiking.org - Researching, writing & sketching up thoughts, understandings and ideas for a sustainable future, connecting thrive, trails, places and technology