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: Summarize the information about retinoids. Here is the information:
Retinoid: The term "retinoid" is a catch-all for an array of vitamin A-based products used on skin. It can treat mild fine lines and wrinkles, acne, and dark spots. It can also improve skin texture.

If you’re looking to treat uneven skin tone, dark spots, or your skin’s texture, look for the word “retinol.” It’s a type of retinoid that’s used for these purposes.

Retinol can give you younger-looking skin by speeding up new skin cell turnover, which starts to slow in your 20s.

To treat acne, dermatologists prescribe one of these retinoids – adapalene, tazarotene, tretinoin, or trifarotene. You’ll also find adapalene in an acne-fighting product available without a prescription.

When spread on acne-prone skin, a retinoid can unclog pores. This can give you clearer skin and allow other acne gels and creams to work better.

When to apply a retinoid: Dr. Baxt recommends applying a retinoid before bed. After washing your face, wait 20 to 30 minutes and then apply it.

If you find the retinoid too drying, apply a moisturizer immediately after washing your face, using a moisturizer that won’t clog your pores. Then apply the retinoid 20 to 30 minutes later.
Response: Retinoids are vitamin A-based products. They have been found to treat mild fine lines, acne, wrinkles, and dark spots and improve skin texture. Apply retinoids 20 to 30 minutes after washing your face before bed.

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.

Summarize the causes and effects of acid rain. Here is the information: Acid rain is rainfall that has been made acidic by atmospheric pollution, primarily due to the burning of fossil fuels. The main pollutants responsible for acid rain are sulfur dioxide (SO2) and nitrogen oxides (NOx), which are released into the atmosphere by industrial processes, power generation, and motor vehicles. These pollutants react with water vapor, oxygen, and other chemicals in the atmosphere to form sulfuric acid and nitric acid. When acid rain falls, it can have severe environmental impacts. It can lower the pH of soil and water bodies, harming aquatic life and inhibiting plant growth. Acid rain also accelerates the decay of buildings, monuments, and structures made of stone, metal, or paint. In humans, acid rain can exacerbate respiratory diseases and other health problems due to the increased atmospheric concentrations of fine particulates and sulfur dioxide.
user
Acid rain is caused by pollutants like sulfur dioxide and nitrogen oxides from burning fossil fuels. These chemicals react with water vapor to form acids that fall as rain. It lowers soil and water pH, harms wildlife, damages structures, and can worsen human respiratory diseases.
assistant