Scavenging In Port-au-Prince, Ouest, Haiti

Causes
• In developing countries
Over the past half century, in-country migration and increased fertility rates have caused the population of cities in the developing world to mushroom. The global population of urban dwellers is expected to double between 1987 and 2015, with 90% of this growth occurring in developing countries. Much of the new population has settled in urban slums and squatter settlements, which have expanded rapidly with no central planning. The United Nations Habitat Report found that nearly one billion people worldwide live in slums, about a third of the world’s urban dwellers.
The rapid urbanization greatly increased the demand for informal waste collecting services, as cities lacked the infrastructure and resources to collect the totality of wastes generated by their inhabitants. Despite spending 30–50% of operation budgets on waste management, developing world cities today collect only 50–80% of refuse generated by inhabitants. Residents and businesses often resort to burning garbage or disposing of it streets, rivers, vacant lots, and open dumps. This is a source of air, land, and water pollution that threatens human health and the environment. Informal waste collectors help mitigate this harm by collecting recyclable materials by foot or in pushcarts, tricycles, donkey carts, horse carts, and pickup trucks.