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In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Article: There are a lot of public libraries in Britain. These libraries have more than one hundred and fifteen million books, not including those libraries of public schools. Public libraries not only lend books, music records but also help children, patients in hospitals and others to get special play readings, film shows and so on. The first public libraries were founded in about the year 1850. Today's public libraries usually have a reading-room, a lending room and a reference room. The greatest and most famous library in Britain is that of the British Library in London. It was founded in 1973 and has over 10, 000, 000 books. It has nearly every magazine, newspaper and book published in Britain and other parts across the world. 
 Answer: 10,000,000 or less.
Solution: How many books are there in the British Library?
Why? In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

New input: Article: Everyone knows that eating too much junk food is not good to our health. Yet, what is it about junk food that is so completely irresistible ? For one thing, it's everywhere. From chips in fast food restaurants to candy in supermarkets, junk food always seems available. Thankfully, science is now providing new clues to help us reduce snacking. Make friends with dainty  eaters. Studies have found that people tend to increase or reduce the amount of food they eat depending on what their companions are taking in. See happy movies... and always get the smaller bag of popcorn . According to some experts, people eat up to 29% more popcorn if they are watching a sad or serious movie, compared to when they are watching a comedy. Viewers consumed almost 200 calories more when snacking from a large bucket, as opposed to when given a medium-sized container. Eat breakfast. Nutritionists have gone back and forth about the question of how much to eat in the morning, but new studies suggest that consuming a good breakfast is a must. Surveys on long-term weight-loss show that two key factors in keeping weight down are eating breakfast and exercising. Divide your food and conquer overeating. Any kind of dividing your food into portions slows down your eating. Any kind of marker makes you aware of what you're eating and of portion size. Researchers advise reallocating snack foods into small plastic bags. It sounds simplistic, but it works. 
 Answer: Because it's available here and there.
Solution:
Why do people eat too much junk food though it is bad for our health?