This document discusses poverty and informal settlements. It defines poverty as a lack of resources and dignity. Causes of poverty include population growth, low agricultural productivity, and unequal development. Measures of poverty include headcount ratios, poverty gaps, and severity indexes. Informal settlements like slums and squatter settlements form due to lack of affordable housing. Squatters illegally settle on public or vacant land. Rural to urban migration is driven by opportunities in cities but many migrants end up in low-wage informal jobs. Poverty leads to socioeconomic deprivation and environmental degradation. The informal sector provides subsistence but has issues like unequal employment that need addressing. Informal economic activities present challenges for urban planning authorities.