This year, sustainable design finally went mainstream at Milan design week. Here is Dezeen's pick of the 10 best projects and shows that tackled environmental issues.

Broken Nature: Design Takes on Human Survival by Paola Antonelli
Paola Antonelli has brought together 120 architecture and design projects from the last 30 years for her Milan Triennale exhibition, Broken Nature: Design Takes on Human Survival, which aims to explore humankind's fractured relationship with the planet.
By showcasing projects such as Italian Limes, which looks at shifting national borders as ice melts in the Alps, Antonelli hopes to make people aware of the "crisis in our humanity" and encourage us to make the most of the time we have left on the planet.
Conifera by Arthur Mamou-Mani x COS
French architect Arthur Mamou-Mani demonstrated his investment in circular design at Milan this year with his Conifera installation designed for fashion brand COS, which was created using only sustainable materials.
Installed in the courtyard of Palazzo Litta, the large-scale parametric structure was constructed from 700 bio-bricks, each printed in a mixture of polylactic acid (PLA) ? a fully compostable bioplastic that is made using renewable resources ? and wood, and fixed together using PLA cable ties.

Ro Plastic Prize by Rossana Orlandi
Rossana Orlandi challenged designers to develop new ways of recycling and reusing plastic in her Ro Plastic Prize competition, which was launched at th...