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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: It's not the first movie to show the end of the world. But in the latest box office hit 2012 it is neither aliens nor a killer disease that threaten the human race, but climate change. Some say the film lacks good dialogue and its science is questionable, others believe German director Roland Emmerich makes up for these flaws in special effects. An earthquake destroys the White House and Yellow stone  National Park ends up in flames. Emmerich borrows from the old Mayan  story which says, that the world will end in 2012.He is being criticized for Internet rumors  about doomsday  "There is no factual basis for these claims,'' NASA said on its website. "Credible  scientists worldwide know of no threat connected with 2012,'' it insisted. "After all, our planet has been getting along just fine for more than 4 billion years, " they added. According to the UK's Daily Telegraph, it was first thought that the disaster would happen in May 2003. When the world continued, supporters picked the last day of the Mayan calendar. "Every culture has a myth  of destruction , just as they have a myth of creation. These myths |of destruction tend to surface  during times of crisis , " Michael A. Ryan, an assistant profess of history,speaking to Purdue University News. Ryan studies apocalyptic  themes from the Middle Ages at the US university. "Today's current economic climate is a state of crisis for many people who are worried whether they can afford to feed themselves,"he added. 
 Answer: A killer disease.
Solution:
What led to the end of the world according to the film 2012?