22 slide PPT covering overpopulation, underpopulation, optimum population including case studies. I used this for an A-Level Geography class studying the Population Core Human Geography topic. Detailed breakdown of the PPT: Definition of key words: overpopulation, underpopulation, optimum population, population policies Bangladesh case study, an overpopulation country. Case study includes embedded video, maps, background information about the country, and information about the causes and impacts of overpopulation. Australia case study, an underpopulation country. Case study includes embedded video, maps, background information about the country, and info about the causes and impacts of underpopulation there. Pack includes a task sheet which students can complete using information from the PPT. This comfortably filled a 60 minute lesson.