LooWatt is a toilet that can be flushed without the need for any water, safely disposing of human waste to be turned into electricity and fertiliser. More about LooWatt's waterless toilet system turns waste into electricity and fertiliser
Mexican designer Fernando Laposse has developed Totomoxtle, a marquetry material made from the colourful husks of heirloom corn species that restore vital biodiversity. More about Totomoxtle is a material bringing rare corn back from the brink of extinction
RAU Architects and Ro&Ad Architects have designed the egg-shaped Tij Observatory for the Scheelhoek Nature Reserve in Stellendam, the Netherlands, which can be taken apart and rebuilt elsewhere. More about Thatched reeds cover egg-shaped observatory for watching birds
Adidas has launched a sneaker made from virgin plastic that can be ground up and remade again, as part of the company's bid to mitigate the plastic crisis. More about Adidas unveils fully recyclable Futurecraft Loop sneaker
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. More about Ten design projects that prioritised sustainability at Milan design week 2019
Note Design Studio has installed geometric totem poles inside a historic Milanese building to showcase the potential of IQ Surface, a new material by Tarkett that can be continuously recycled. More about Note Design Studio champions closed-loop sustainability with Formations installation
Italian architect Carlo Ratti has grown a series of arched architectural structures from mushroom mycelium, which will be returned to the soil after Milan design week is over, in a fully circular fashion. More about Carlo Ratti grows Gaudí-inspired structures with a kilometre of mushroom mycelium
French architect Arthur Mamou-Mani has assembled a structure from 700 bioplastic bricks in the courtyard of a 16th-century palazzo, as this year's Milan design week installation for fashion brand COS. More about Arthur Mamou-Mani promotes circular design with bioplastic Conifera installation for COS
Emeco has teamed with London designers Barber and Osgerby for the first time to produce a stacking chair made from a specially developed recycled plastic. More about Barber and Osgerby creates chair for Emeco that can be endlessly recycled
Overtreders W employed the principles of a circular economy when designing the temporary RAUM pavilion in Utrecht, the Netherlands. More about Sustainable RAUM pavilion by Overtreders W designed to be reused
Furniture, lamps and jewellery by designers from Norway, which demonstrate sustainable design and the circular economy, will be displayed at an exhibition called Join at this year's Milan design week. More about Circular design to be showcased at Norwegian Presence in Milan
IKEA's research lab Space10 has crafted a miniature wooden village to demonstrate how communities could create their own circular clean energy system. More about Space10's SolarVille project proposes communities generate and share energy
Guatemalan designer Elena Amato has created sheets of bacterial cellulose with paper-like qualities as a sustainable alternative to the plastic packaging used in personal care products. More about Elena Amato creates sustainable cosmetics packaging from bacteria
Brighton-based design studio Gomi has created a portable bluetooth speaker using plastic waste that is deemed non-recyclable by local councils in the UK. More about Gomi portable speakers are made from non-recyclable plastic waste
Four designers from the Royal College of Art and Imperial College have developed a series of machines that turn seafood waste into a biodegradable and recyclable bioplastic. More about Shellworks turns discarded lobster shells into recyclable bioplastic objects
IKEA has announced plans to start renting its furniture, as part of a move towards a circular economy that includes refurbishing and re-selling products. More about IKEA to begin renting furniture as part of wider sustainable push
The residents of Thessaloniki, Greece, can now recycle their plastic waste into 3D printed furniture for the city, using a new laboratory set up by Rotterdam studio The New Raw. More about Print Your City turns recycled food containers into street furniture
Architecture studio Snøhetta is working towards a more circular economy with its latest chair design, which is made from recycled plastic and steel taken from Norwegian fish farming industries. More about Snøhetta unveils S-1500 chair made from discarded fish nets
Lithuanian designer Agne Kucerenkaite reveals the value of industrial metal waste in her project Ignorance is Bliss, which sees the material used to make colourful ceramics. More about Agne Kucerenkaite repurposes "valueless" metal waste to create colourful ceramic glazes
A pop-up restaurant that is built from recycled food packaging and that composts all of its leftovers has been set up at the WantedDesign Manhattan fair. More about Zero Waste Bistro installation provides circular-economy model at WantedDesign