the winter, night temperatures can sometimes fall below the freezing point. Annual precipitation averages around , 32% of which is concentrated in the two wettest months, November and December, while July and August are the driest receiving some or no precipitation. Human geography Castro Verde Municipality is situated within an area commonly known as "Campo Branco", within the plains of the Alentejo that front the Serra do Caldeirão. It is located in the district of Beja, and limited to the north by the municipalities of Beja and Aljustrel, south by the municipality of Almodôvar, east by the municipality of Mértola and west by the municipality of Ourique. Over the past few decades, the population has generally concentrated in the larger urban communities. In 1970, the population of the municipality was 9004 inhabitants, decreasing to 7472 by 1981. Ten years later, it had grown slowly to 7786 residents, although the recent census (2001) indicated a small decrease (fixed at 7603 inhabitants). The literacy rates are relatively high, although 15.7% are considered illiterate. This is accentuated by 70% of the resident population having attained only a primary school level of education. Parishes More than 50% of these residents live in the town of Castro Verde (4820 residents); the remaining towns account for the rest: Casével, 365 inhabitants; Entradas, 774 inhabitants; Santa Bárbara dos Padrões, 1271 inhabitants; and São Marcos da Atabueira, 373 inhabitants. With an area 567.2 km2, these communities are scattered in various medium to small localities divided into four civil parishes (Portuguese: freguesias): Castro Verde e Casével Entradas Santa Bárbara de Padrões São Marcos da Ataboeira Economy Population growth has primarily been the result developments with the mining industry, and in particular the Neves-Corvo mining complex. Its activities, and related services, civil construction and public works have seen reciprocal growth in municipal services and population. There has also been a parallel growth in mining jobs related to this development, since 1979. There is a hierarchical distribution of the active workforce: 11.12% are employed in the primary sector, 32.7% in secondary industries, while a majority (56.18%) are employed in tertiary services. This distribution is generally maintained in all communities in the municipality, except Santa Bárbara dos Padrões, where the Neves-Corvo mine is the main employer, and Entradas, where some agriculture and ranching occur. Transport Castro Verde is located in a privileged location along a corridor that connects the northern districts to