The document discusses animal testing, which involves testing products like medicines, cosmetics, and cleaning supplies on animals to determine if they are safe for human use. It notes that animal testing is controversial, with some people supporting it because it protects humans from harm, while others oppose it because of the suffering it causes animals. The document provides details on the conditions animals experience during testing, such as being confined to small spaces and experiencing pain, and the large numbers of certain animals, like mice and rats, that are killed each day through testing. It aims to help readers make an informed decision about whether they support or oppose animal testing.