the start-up of the Solar Lapa Park (BA), with 158 MW, Solar Ituverava Park (BA), with 254 MW, and the Solar Park Nova Olinda (PI), with 292 MW, considered the largest solar parks in Latin America. In 2018, the Solar Parque Horizonte (BA) was inaugurated, with 103 MW. Demographics Urban areas and rural areas Nordeste's major cities are almost all on the Atlantic coast. Some exceptions can be seen, however, like Petrolina-Juazeiro conurbation Bahia/Pernambuco (population over 500,000) on the São Francisco River and Teresina-Timon conurbation Piaui (population nearly 1,000,000) on the Parnaiba River. Good rural areas are scarce and generally they are all near the coast, or in the west of Maranhão, and are mainly used for exportation products. In the semi-arid areas of the Northeast Region, rural areas do exist, but rain is scarce in the region; rural areas in the interior are generally based on subsistence agriculture. Fazendas (large farms) are common in the interior, where cattle-raising and the cultivation of tropical fruit is often practiced. Also, in the areas where water is scarce local politicians often use the promise of irrigation projects as a bargaining chip to win elections. Ethnic groups Northeastern Brazilians are a result of the mixing of Europeans, Africans and Native Americans. African ancestry is significant particularly in the coastal areas, and especially in Bahia, Pernambuco and Maranhão. Native American ancestry is also present in all states, though more significantly in Ceará and Maranhão. Northeastern Brazilians also have a significant degree of European ancestry. The racial makeup of the region is considered to be one of the primary reasons for which Northeastern Brazilians are often the target of prejudice and discrimination within Brazil, with other reasons including the region's comparative poverty and its leftist political leanings. Ethnic composition of Northeast Brazil compared to other regions The composition of the Northeast of Brazil compared to other regions of Brazil according to autosomal genetic studies focused on the Brazilian population (which has been found to be a complex melting pot of European, African and Native Americans components): A 2015 autosomal genetic study, which also analysed data of 25 studies of 38 different Brazilian populations concluded that: European ancestry accounts for 62% of the heritage of the population, followed by the African (21%) and the Native American (17%). The European contribution is highest in Southern Brazil (77%), the African highest in Northeast Brazil (27%) and the Native