Founded in 1972 near Winchester, UK, Marwell Zoo is owned by Marwell Wildlife—an action-oriented charity with world-renowned conservation programs. Marwell’s landscaped, 140-acre park is home to over 150 species of exotic animals from around the world—from endangered Amur tigers, snow leopards, lemurs, and white rhinos, to giraffes, gibbons, and penguins.
Leading the way in sustainability with the goal of becoming carbon neutral by 2020, Marwell’s Tropical House is “powered by poo.” Some of the zoo’s 700 tons of animal waste—consisting of dung, leftover hay, and soiled bedding—is processed to provide heat for buildings across the zoo, enabling it to reduce its carbon footprint and dependency on fossil fuels.
The structures curved roof is built using the latest ETFE (ethylene tetrafluoroethylene) technology, allowing the transmission of almost the entire UV spectrum to shine through, creating ideal tropical conditions for 65 different animal and 650 plant species to flourish. Rainwater is harvested from the roof and stored in two 50,000-litre tanks, providing ample water for the 70,000-litre aquarium and plants and making the building completely self-sufficient.