Question

why do different country use different poverty line

Answer 1

because the cost of living varies form country to country.In some countries the income required to live a decent life(above poverty line)is lower than the income required to live a decent life in another country.The price of commodities

Answer 2

Different countries have different poverty lines because the cost of living varies form country to country.In some countries the income required to live a decent life(above poverty line)is lower than the income required to live a decent life in another country.The price of commodities and the cost incurred for accessing heath and education facilities are different in different countries.