Gabion wall filled with plastic bottles. Image © Jordi Surroca
Recycling and upcycling of materials and structures have become more and more popular in architecture as alternatives to the production of components in construction, typically associated with increased energy consumption and high levels of pollutants released into the atmosphere. The main difference between these two methods is that, while the former uses a certain amount of energy to process the material before it is reused, the latter does not require this process, but rather reuses it just as it was discarded.