The Republic of Kenya is a country in Eastern Africa. The country is named after Mount Kenya, a significant landmark mountain. Kenya has considerable land area of wildlife habitat. The "Big Five" animals of Africa can also be found in Kenya : the lion, leopard, buffalo, rhinoceros and elephant. A significant population of other wild animals, reptiles and birds can be found in the national parks and game reserves in the country. The environment of Kenya is threatened by high population growth and its side effects. Kenya enjoys a tropical climate. It is hot and humid at the coast, temperate inland and very dry in the north and northeast parts of the country. Kenya receives a great deal of sunshine all the year round and summer clothes are worn throughout the year. However, it is usually cool at night and early in the morning. The long rain season occurs from April to June. Kenya's education system consists of early childhood education, primary, secondary and college. Early childhood education takes at least three years, primary eight years, secondary four and university four or six years depending on the course. Kenya has a relatively well-developed transport system compared to neighboring countries in Africa. The system consists of extensive paved and unpaved roads, railways with links to ports and neighbor Uganda, and 15 airports with paved runways.