Single-use plastics are taking over in supermarkets and almost everywhere else. Plastic is infamous for polluting the planet, as it can take up to 450 years to decompose. Other materials of today also come from energy-intensive manufacturing processes. They are formed by high-energy extraction methods. It is clear that the current industries are contributing to carbon emissions and non-biodegradable waste. As the world is being taken over by waste and pollution, we need alternative materials. Advancements in science and a keen interest in natural materials has started a chain of action. New materials like hemp, algae, seaweed, and mycelium are replacing plastics. These radical ideas challenge everything we know about the materials we are accustomed to. How can mycelium become part of the circular economy?