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Rio's Challenges 2. The poorest 50% in Rio only earn % of the city's total income, in comparison to the richest 1%, who earn %. As a result, people live in s - illegal settlements where people have built homes on land they don't own - and there are a total of in Rio alone. The houses are built and unorganised, and are often built on the , limiting access. % are built in suburbs, % in outskirts, and some are even being built from the city centre. Unemployment is , and infant mortality can be as high as . Therefore, crime is a major issue in these areas: murder, kidnapping and other violent crimes occur often, and dominated favelas through . To tackle it, in 2013 s were set up to take back control from gangs, and have cleared small favelas, though many say they have targeted ones nearest to the . Similarly, , the largest favela in Rio that looks over the famous Bay, has been improved so that % of houses have electricity and are built from brick.