Circular beer means zero waste, it is produced with recovered water and can be made from food waste. And nothing is thrown away from the beer: every litre of beer generates 200 grams of crushed barley grains threshing, equal to 39 billion tonnes of waste per year. Threshing can be used to produce: supplements, feeds and fertilizers.
A Belgian brewery has brought a 7 thousand year old recipe back to life: the ancient Babylonians produced beer from bread scraps, replacing 20% of the malt. 1 litre of beer is made with 4/10 litres of water. Each year 1.96 billion hectolitres of beer are produced. This uses more than 800 billion litres of water every year. A Dutch brewery has discovered a way to filter rainwater.
Sustainable packaging: every year 10 million tonnes of plastic ends up in the sea. 50/70% of microplastics are swallowed by sea birds, 80% by turtles. An American brewery has created biodegradable "six packs".