How do you make easy and eco-friendly machines?

To create easy and eco-friendly machines, start by using sustainable materials like recycled plastics, bamboo, or metal. Design simple mechanisms that require minimal energy, such as wind or solar power, to operate efficiently. Incorporate easily accessible components and modular designs for straightforward assembly and repairs, promoting longevity and reducing waste. Lastly, prioritize designs that minimize resource consumption and environmental impact throughout their lifecycle.