If you haven’t discovered yet, the paper that newspaper is printed on straight-up sucks. It is highly acidic, yellows/browns quickly, and after a number of years, will fall apart. While that might not seem like a big deal on the surface, if that newspaper clipping touches other documents, it will spread its acid like a fungus, causing them to turn brown and degrade much faster.*
Some archives have policies where they won’t keep original clippings. Instead, the archivist might clip, photocopy, label it with the date and source name, and throw the newspaper away. You can also scan them, but make sure to follow our instructions here about proper file formats. Remember: the PDF is always your friend.