Gran Fierro, an Argentine restaurant, is located on a street in central Prague. Owner Juan Cruz, with a mission to bring sustainability to the core of the restaurant, has come out of the big segregation in a new, more conscious way, and is transforming Gran Fierro into a circular restaurant.

The new interior of Gran Fierro, inspired by Juan’s Argentinian roots, was designed by the award-winning studio Forma Fatal. Among many original details, there is an impressive wall with hanging coals that showcases their commitment to sustainability.

Because the kitchen is based on fire, charcoal is at its heart. The most important thing is to reflect on the negative impact of the charcoal industry in order to avoid excessive deforestation. It also gains knowledge about sustainable alternative energy sources. Gran Fierro's walls are made from a mixture of charcoal and biochar that look the same but aren't, and understanding the differences between them is also crucial for sustainability.

Forma Fatal found that charcoal purchased from a region in South America called Gran Chaco had no clear rules against deforestation. This is a worldwide problem, and in many tropical countries, felling of trees is not properly managed. This is an issue the studio wants to prioritize and help spread awareness. So, Gran Fierro is now using sustainable charcoal from Marabú, a thorn bush from Cuba which grows aggressively and encroaches land which must be controlled.