The kinds of food that people eat vary from one country to another and even within countries. In some countries, for example, the people eat much meat. In some other countries, meat is served only on special occasions. People who are vegetarians eat no meat at all. Many people like certain foods that other people find very unappetizing. The Chinese use the nests of birds called swifts to make bird’s-nest soup. The birds build the nests with their saliva.
People of various cultures also prepare foods differently. In many cases, the fuel resources and cooking equipment available determine how foods are prepared. Thus, some people cook foods over an open fire. Others may use a microwave oven. Still others may eat most of their foods raw. Some people add fiery spices to their dishes. Others prefer little seasoning. Some people eat natural or unprocessed foods. Others eat foods that have been highly processed.
Diets differ for a number of reasons, including geographic reasons, economic reasons, religious reasons and customs. But differences in diet are not as great as they once were. The growth of tourism and the development of modern transportation and communication systems have led to an exchange of foods and eating habits among people throughout the world.
Geographic reasons. The location, climate, and physical features of a region help determine what the people of that region eat. In general, people who live on islands or along seacoasts depend heavily on foods from the ocean. People who live far from the sea rely mainly on livestock or grains for food. People of tropical areas can grow a variety of fruits and vegetables the year around. People who live in cool regions, which have a short growing season, depend on such crops as grains or potatoes. Terrain and soil also help determine what crops the people of a region can grow. For example, corn grows best on level, open fields with rich, well-drained soil. Rice grows in lowlands areas where the soil holds water well.
Although geography still strongly influences what people in many parts of the world eat, its importance has declined – especially in industrial countries. The development of faster transportation and of modern methods of food preservation enables many people to eat foods produced in distant lands. For example, people in numerous countries enjoy bananas from Ecuador, olives and oranges from Spain, dairy products from New Zealand, and sardines from Norway. In addition, many farmers have learned how to grow crops in unfavorable areas.