Visitors to Marwell Zoo’s new Tropical House can expect to see a sloth, pygmy marmosets, tortoises, and a giant aquarium with 2,500 fish.
Operators of the Hampshire attraction said 700 tonnes of animal waste – dung, soiled bedding and leftover hay – will help power the exhibit.
A wood chip boiler will be supplemented by one capable of burning straw-based animal manure later this year, helping the zoo achieve its goal of becoming carbon neutral by 2020.
![Tiger barb fish swim in the 70,000 litre aquarium in the new Tropical House at Marwell Zoo in Hampshire (Andrew Matthews/PA)](https://image.assets.pressassociation.io/v2/image/production/8e71b79bf345b005b9bd33a4b8557d9bY29udGVudHNlYXJjaCwxNTIxNzI5MjM0/2.35625627.jpg?w=640)
![A Marwell Zoo employee makes their way around the new Tropical House (Andrew Matthews/PA)](https://image.assets.pressassociation.io/v2/image/production/7658b0a7013399bb631aead0de64aa59Y29udGVudHNlYXJjaCwxNTIxNzI5Mzcy/2.35625590.jpg?w=640)
![Rica the two-toed Sloth in the new Tropical House at Marwell Zoo in Hampshire (Andrew Matthews/PA)](https://image.assets.pressassociation.io/v2/image/production/2358ca4f303ae5837a5e02978a52c17fY29udGVudHNlYXJjaCwxNTIxNzI5NDUy/2.35625638.jpg?w=640)
![A Pygmy Marmoset in the Tropical House at Marwell Zoo in Hampshire (Andrew Matthews/PA)](https://image.assets.pressassociation.io/v2/image/production/76e022ee579fadf9ae07f0d2f337e793Y29udGVudHNlYXJjaCwxNTIxNzI5NTM5/2.35625581.jpg?w=640)
![Ross Brown cleans the 70,000 litre aquarium in the Tropical House at Marwell Zoo in Hampshire (Andrew Matthews/PA)](https://image.assets.pressassociation.io/v2/image/production/272d2bf585f2613a868d400deccb9517Y29udGVudHNlYXJjaCwxNTIxNzI5NjQx/2.35625512.jpg?w=640)