Today’s Solutions: February 03, 2026

How would the circular economy actually work in practice? To find out, all we have to do is look within an abandoned indoor waterpark that sits on the banks of the river Maas in Rotterdam.

Yes, a derelict swimming pool may seem like a strange place to see the circular economy in action, but the old waterpark, formally known as Tropicana, has been taken over by 30 businesses that all share resources and reuse the waste in a trial “circular economy”. They call it BlueCity. Tropicana had fallen into disuse in 2012, but to entrepreneur Siemen Cox, the structure of the building looked like a giant greenhouse—which was perfect for Cox, who was looking for a site to grow mushrooms using coffee grounds.

Cox was able to convince investors and city officials that the old Tropicana could become an ecosystem of circular entrepreneurs, and well, the rest is history. Beneath the pool are craft brewers Vet & Lazy who are developing a pioneering chemical-free rainwater purification system, and the circular caterer Arabella van Aartrijk, who bakes cookies from Vet & Lazy’s spent grain and rescues “ugly” food. In other parts of BlueCity, old mangoes are mashed into leather and used plastic is 3D-printed into new products.

Want to see for yourself what the circular economy could like? If so, look no further.

Solutions News Source Print this article
More of Today's Solutions

Yale will offer free tuition to families earning under $200,000 starting in 2026

BY THE OPTIMIST DAILY EDITORIAL TEAM The prestigious Yale University is opening its doors even wider. Beginning in the 2026-2027 academic year, families earning ...

Read More

5 smart ways to prep your garden now for a stunning spring bloom

BY THE OPTIMIST DAILY EDITORIAL TEAM Spring might feel like a distant dream, but a few mild winter days offer the perfect window to ...

Read More

Forget plastic: Here are some greener ways to freeze food

While Ziploc bags and plastic wrap can be useful for sealing up food that’s going into the freezer, there are better alternatives—ones that are ...

Read More

Introducing “True American”— a mini-series

Last month on Independence Day, The New Yorker published an issue featuring cover art by graphic illustrator Christ Ware. The narrative piece, called “House ...

Read More