Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Explain the main difference between pico de gallo and salsa. 


What’s the difference between pico de gallo and salsa?
Pico de gallo shares the same basic ingredients as traditional red salsa, but the preparation methods are different.

Pico de gallo always uses raw, diced ingredients. It’s less wet, and it adds a wonderful chunky texture and substance to tacos and more. Salsa can call for roasted or stewed tomatoes, and is generally closer to a purée in texture.

Both are delicious, both go great with guacamole, and I often layer pico de gallo over salsa for double the flavor (if only you could see my regular burrito bowl order at Chipotle).
Response: The main difference between pico de gallo and salsa is the texture: pico de gallo is chunky, whereas salsa is more like a puree. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Compare and contrast renewable and non-renewable energy sources.
user
Renewable energy sources, like wind and solar power, are naturally replenished and have a lower environmental impact. Non-renewable energy sources, such as coal and oil, are finite and release harmful pollutants when used, contributing to environmental degradation.
assistant