World Population is 7.5 billion. By 2050 it will be 10 bn plus. (was One Bn in 1800, 4 Bn in 1974). Current average net population growth about 130,000/day. (Interesting to see World Population Clock). Every second person on the globe lives in urban areas, and by 2050 three out of four (70%). By 2020, it is estimated that the world slum population will cross 1 bn. World needs 4,000 houses an hour to keep up with demand and backlog (UN-Habitat). Since “Serviced land” availability is limited, population density (Persons/Sq. KM) is on the rise.
In Bangladesh, Population Density is 1,237 (was 381 in 1961), while it is 28,410 in city of Dhaka. In India, Population Density is 441 (was 154 in 1961), while it is 28,500 in the metropolitan of Mumbai. Almost half of the world lives on less than $ 2.50 a day, and four out of five under $ 10 a day .In view of this population and urbanization explosion. The percentage of people without access to decent, stable housing is rising. Adequate housing is vital to the health of the world’s economies, communities and populations. If we are to succeed in the fight against poverty, we must support expansion of housing both as policy as well as practice.