Me 40 a public service announcement is a short 30 or 60 second radio or tv announcement that gives people information about something that is useful to them--such as how to stay healthy, how to spend money wisely, or how to protect their environment. for this assignment, design a public service announcement that informs people of how to protect their watershed from harmful human activities. include information on why watersheds are important, at least three ways human affect them, and at least three specific things that humans can do to protect their watersheds. write a script for your announcement and also include ideas for any music or video images that you think would enhance your message. for example, write what the actor in the announcement will say. list any music or images you would like to incorporate and describe when they should appear.