From some time a lot has been talked about sustainability as a key to getting out of universal pollution, from the depletion of resources, from climatic problems, from the excess of waste. Much is done, even if not yet enough, to create aligned products on the search for sustainability in materials, productive techniques,  circular economy, recycling, architecture, waste. Even when companies declare the sustainability of their products, it is certainly not easy to recognize where ecological innovation is in design products, which sometimes also make marketing with green-washing operations. We asked the Artificial Intelligence behind the ChatGPT program to better explain what is meant by "sustainable design". His response, simple and clear, which is based on millions of information caught in the infinite ocean of the network, is a testimony of general knowledge and a help to understand. As well an interesting experiment.