Sahara in the context of "Niger"

The natural environment or natural world encompasses all biotic and abiotic things occurring naturally, meaning in this case not artificial. The term is most often applied to Earth or some parts of Earth. This environment encompasses the interaction of all living species, climate, weather and natural resources that affect human survival and economic activity.The concept of the natural environment can be distinguished as components:

• Complete ecological units that function as natural systems without massive civilized human intervention, including all vegetation, microorganisms, soil, rocks, plateaus, mountains, the atmosphere and natural phenomena that occur within their boundaries and their nature.
• Universal natural resources and physical phenomena that lack clear-cut boundaries, such as air, water and climate, as well as energy, radiation, electric charge and magnetism, not originating from civilized human actions.

In contrast to the natural environment is the built environment. Built environments are where humans have fundamentally transformed landscapes such as urban settings and agricultural land conversion, the natural environment is greatly changed into a simplified human environment. Even acts which seem less extreme, such as building a mud hut or a photovoltaic system in the desert, the modified environment becomes an artificial one. Though many animals build things to provide a better environment for themselves, they are not human, hence beaver dams and the works of mound-building termites are thought of as natural.

Southern Europe is also known as Mediterranean Europe, as its geography is marked by the Mediterranean Sea. Definitions of southern Europe include some or all of these countries and regions: Albania, Andorra, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Gibraltar, Greece, Italy, Kosovo, Malta, Monaco, Montenegro, North Macedonia, Portugal, San Marino, Serbia, Slovenia, southern France, southern Romania, Spain, Ticino (Switzerland), Turkey, and Vatican City.

Southern Europe is focused on the three peninsulas located in the extreme south of the European continent. These are the Iberian Peninsula, the Italian Peninsula, and the Balkan Peninsula. These three peninsulas are separated from the rest of Europe by towering mountain ranges, respectively by the Pyrenees, the Alps and the Balkan Mountains. The location of these peninsulas in the heart of the Mediterranean Sea, as well as their mountainous reliefs, provide them with very different types of climates (mainly subtropical Mediterranean) from the rest of the continent. So, the Sirocco hot wind that originates in the heart of the Sahara blows over Italy, going up to the interior of the Alpine arc (Po Valley). The Alps prevent the Sirocco from spreading to the rest of Europe. And, conversely, the Alps and the Pyrenees protect the Italian and Iberian Peninsulas from the rains and icy winds from the south of France such as the Mistral and the Tramontane. When the Mistral and the Tramontane are blowing, this provokes an "upwelling" phenomenon on the French coast. They push the surface waters out to sea and bring deeper, cooler waters up to the seaside. Consequently, the temperature of the waters of the French coasts are therefore very cool even in summer, and not representative of the rest of the Mediterranean.This same kind of phenomenon takes place between the two slopes of the Balkan mountain range. These mountains have, moreover, been a serious handicap to population displacement, focusing southern Europe mainly on the Mediterranean world. The climate and cultures are therefore very specific.

North Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of the Western Sahara in the west, to Egypt and Sudan's Red Sea coast in the east.

The most common definition for the region's boundaries includes Algeria, Egypt, Libya, Morocco, Tunisia, and Western Sahara, the territory disputed between Morocco and the partially recognized Sahrawi Arab Democratic Republic. The United Nations’ definition includes all these countries as well as Sudan. The African Union defines the region similarly, only differing from the UN in excluding the Sudan and including Mauritania. The Sahel, south of the Sahara Desert, can be considered as the southern boundary of North Africa. North Africa includes the Spanish cities of Ceuta and Melilla, and the plazas de soberanía. It can also be considered to include Malta, as well as other Italian, Portuguese, and Spanish regions such as Lampedusa and Lampione, Madeira, and the Canary Islands, which are all either closer to the African continent than Europe or as close to the African continent as Europe.

Numidia (Punic: 𐤌𐤌𐤋𐤊𐤕 𐤌𐤔𐤋𐤉𐤉𐤌, romanized: MMLKT MŠLYYM) was the ancient kingdom of the Numidians in northwest Africa, initially comprising the northern part of what is now Algeria, but later expanding into modern Tunisia and Libya. The polity was originally divided between the Massylii state in the east (Capital: Cirta) and the Masaesyli state in the west (Capital: Siga). During the Second Punic War (218–201 BC), Masinissa, king of the Massylii, defeated Syphax of the Masaesyli to unify Numidia into the first unified Berber state for Numidians in present-day Algeria. Initially a sovereign state and an ally of Rome, the kingdom later alternated between being a Roman province and a Roman client state.

Numidia, at its foundation, was bordered by the Moulouya River to the west, Africa Proconsularis and Cyrenaica to the east. the Mediterranean Sea to the north, and the Sahara to the south so that Numidia entirely surrounded Carthage except towards the sea. before Masinissa expanded past the Moulouya and vassalizing Bokkar, and reaching the Atlantic ocean to the west.

In Egypt, the Western Desert is an area of the Sahara that lies west of the river Nile, up to the Libyan border, and south from the Mediterranean Sea to the border with Sudan. It is named in contrast to the Eastern Desert which extends east from the Nile to the Red Sea, although both are part of the broader Libyan desert in North Africa. The Western Desert is mostly rocky desert, save for an area of sandy desert, known as the Great Sand Sea, lying to the west and extending across the Libyan border.The desert covers an area of 680,650 km (262,800 sq mi) which is two-thirds of the land area of the country. Its highest elevation is 1,000 m (3,300 ft) in the Gilf Kebir plateau to the far south-west of the country, on the Egypt-Sudan-Libya border.The Western Desert is barren and uninhabited save for a chain of oases which extend in an arc from Siwa, in the north-west, to Kharga in the south.It has been the scene of conflict in modern times, particularly during the Second World War.

Administratively the Western Desert is divided between various governorates; in the north and west, the Matrouh Governorate administers the area from the Mediterranean south to approx 27°40' N latitude, and the New Valley Governorate from there to the Sudan border, while in the east parts of the Western Desert lie in the Giza, Fayyum, Beni Suef, and Minya Governorates.

The Maghreb (/ˈmɑːɡrəb/; Arabic: ْاَلْمَغْرِب, romanized: al-Maghrib, lit. 'The place where the sun sets' [ælˈmaɣrɪb] ), also known as the Arab Maghreb (Arabic: اَلْمَغْرِبُ الْعَرَبِيُّ, romanized: al-Maghrib al-ʿArabi, lit. 'the Arab west') or the Greater Maghreb (Arabic: المغرب الكبير al-Maghrib al-Kabīr), and Northwest Africa, is the western part of the Arab world. The region comprises western and central North Africa, including Algeria, Libya, Mauritania, Morocco, and Tunisia. The Maghreb also includes the disputed territory of Western Sahara. As of 2018, the region had a population of over 100 million people.

The Maghreb is usually defined as encompassing much of the northern part of Africa, including a large portion of the Sahara Desert, but excluding Egypt and Sudan, which are considered to be located in the Mashriq—the eastern part of the Arab world. The traditional definition of the Maghreb—which restricted its scope to the Atlas Mountains and the coastal plains of Morocco, Algeria, Tunisia and Libya—was expanded in modern times to include Mauritania and the disputed territory of Western Sahara. During the era of al-Andalus on the Iberian Peninsula (711–1492), the Maghreb's inhabitants—the Muslim Maghrebis—were known by Europeans as the "Moors". The Greeks referred to the region as the "Land of the Atlas", referring to its Atlas Mountains.

Mauritania, officially the Islamic Republic of Mauritania, is a country in Northwest Africa. It is bordered by the Atlantic Ocean to the west, Western Sahara to the north and northwest, Algeria to the northeast, Mali to the east and southeast, and Senegal to the southwest. By land area Mauritania is the 11th-largest country in Africa and the 28th-largest in the world; 90% of its territory is in the Sahara desert. Most of its population of some 4.3 million live in the temperate south of the country; roughly a third of the population is concentrated in the capital and largest city, Nouakchott, on the Atlantic coast.

The country's name derives from Mauretania, the Latin name for a region in the ancient Maghreb. It extended from central present-day Algeria to the Atlantic. Berbers occupied what is now Mauritania by the beginning of the 3rd century AD. Groups of Arab tribes migrated to this area in the late 7th century, bringing with them Islam, Arab culture, and the Arabic language. In the early 20th century, Mauritania was colonized by France as part of French West Africa. It achieved independence in 1960. However, the country has since experienced recurrent coups and periods of military dictatorship. The 2008 Mauritanian coup d'état was led by General Mohamed Ould Abdel Aziz, who won subsequent presidential elections in 2009 and 2014. He was succeeded by General Mohamed Ould Ghazouani following the 2019 elections, in what was considered the country's first peaceful transition of power since independence. Mauritania has a poor human rights record, particularly because of its perpetuation of slavery; the 2018 Global Slavery Index estimates there are about 90,000 slaves in the country (or 2.1% of the population).

The Sahrawis, or Sahrawi people (Arabic: صحراويون ṣaḥrāwīyūn; Spanish: saharauis), are an ethnic group native to the western part of the Sahara desert, which includes the Western Sahara, southern Morocco, much of Mauritania, and along the southwestern border of Algeria. They are of mixed Hassani Arab and Sanhaji Berber descent, as well as West African and other indigenous populations.

As with most peoples living in the Sahara, the Sahrawi culture is a mix of Arab and indigenous African elements. Sahrawis are composed of many tribes and are largely speakers of the Hassaniya dialect of Arabic.