<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  How can you improve the energy efficiency of a building? Context: Improving energy efficiency in a building can be achieved through strategies such as using energy-efficient appliances, good insulation, and passive design. Answer: [/INST]By using energy-efficient appliances, good insulation, and passive design strategies.</s>