Cartoon characters are famous for being stranded in the desert, finding the nearest cactus and slicing off the top in order to get a drink of water. But the idea of being able to drink clean, non-toxic water from a cactus is as fictional as those cartoons.
For someone who is stranded on a tropical island, the three most essential things are water, food and shelter. Water is essential to keep the body hydrated and flushed free of toxins, while food helps sustain the body and provides energy. Shelter provides protection from the elements, such as wind, rain, sun and cold.
The Appalachian Mountains extend from Newfoundland and Labrador in Canada down to central Alabama. The Appalachian Mountains are a major landform in the United States, and divide the plains of the midwestern and central states from the coastal regions bordering the Atlantic Ocean.