The Middle-East is a transcontinental region centered on Egypt and Western Asia. Its economies range from the very poor (such as Gaza and Yemen) to the extremely wealthy (such as oil-supported Qatar and United Arab Emirates). Most of the region has a hot, dry climate. Early settled agriculture originated in the Middle-East: it is the centre of origin and diversity of several major cereal and legume crops, and is the site of sheep and goat domestication. Large rivers provide irrigation to support agriculture in certain areas such as the Nile Delta in Egypt and the Tigris and Euphrates watersheds of Mesopotamia.