To sketch for sustainability and responsibility, you need to follow some guidelines and best practices. It starts with research and analysis to understand the context, the problem, the needs, and the goals of your design project. Identify any environmental and social issues or opportunities that relate to it. Sketching can be used as a thinking tool to generate, explore, and evaluate ideas. Don't worry about the quality or details of your sketches; focus on the concepts and messages. It can also be used as a communication tool to share, explain, and discuss your ideas with others. Use sketches to tell stories, show scenarios, and illustrate benefits. Annotations, symbols, and colors can be used to highlight key points. Finally, sketching can be a reflection tool to review, critique, and improve your ideas. Use sketches to test assumptions, identify gaps, and address challenges. Incorporate feedback, questions, and comments to refine your sketches.