The poverty threshold, or poverty line, is the minimum level of income deemed adequate in a given country. In practice, like the definition of poverty, the official or common understanding of the poverty line is significantly higher in developed countries than in developing countries. The common international poverty line has in the past been roughly $1 a day. In 2008, the World Bank came out with a revised figure of $1.25 at 2005 purchasing-power parity (PPP).
Determining the poverty line is usually done by finding the total cost of all the essential resources that an average human adult consumes in one year. The largest of these expenses is typically the rent required to live in an apartment, so historically, economists have paid particular attention to the real estate market and housing prices as a strong poverty line affector. Individual factors are often used to account for various circumstances, such as whether one is a parent, elderly, a child, married, etc. The poverty threshold may be adjusted annually.
Poverty is the state of one who lacks a certain amount of material possessions or money. Absolute poverty or destitution refers to the deprivation of basic human needs, which commonly includes food, water, sanitation, clothing, shelter, health care and education. Relative poverty is defined contextually as economic inequality in the location or society in which people live.
For much of history, poverty was considered largely unavoidable as traditional modes of production were insufficient to give an entire population a comfortable standard of living. After the industrial revolution, mass production in factories made wealth increasingly more inexpensive and accessible. Of more importance is the modernization of agriculture, such as fertilizers, in order to provide enough yield to feed the population. The supply of basic needs can be restricted by constraints on government services such as corruption, tax avoidance, debt and loan conditionalities and by the brain drain of health care and educational professionals. Strategies of increasing income to make basic needs more affordable typically include welfare, economic freedoms, and providing financial services.
Poverty reduction is a major goal and issue for many international organizations such as the United Nations and the World Bank. The World Bank estimated 1.29 billion people were living in absolute poverty in 2008. Of these, about 400 million people in absolute poverty lived in India and 173 million people in China. In USA 1 in 5 children lives in poverty . In terms of percentage of regional populations, sub-Saharan Africa at 47% had the highest incidence rate of absolute poverty in 2008. Between 1990 and 2010, about 663 million people moved above the absolute poverty level. Still, extreme poverty is a global challenge; it is observed in all parts of the world, including the developed economies.