Many people say rapid population growth is the reason why nearly one billion people go hungry every day. However, political factors are also among the causes of hunger. Firs, many countries with hungry citizens actually export crops to other countries. Exporting the crops offers greater profits than selling them at home. Secondly, surpluses that could feed many people are often destroyed in order to keep the price of products high. For example, some crops are allowed to rot, and extra milk is fed to pigs or even dumped.