These are areas of poverty, slums, which generally lack basic services like clean water, or even permanent housing. So it is needed to increase investments in education, health care and other areas. The report talks about some successful efforts by local governments and community groups. For example, it says Freetown, Sierra Leone, has established farming within the city limits to meet much of its growing food demands. In Colombia, engineers have created a bus system in Bogota that the report says has helped reduce air pollution and improve quality of life. And governments also need to consider why people are moving out of rural areas. Climate change, drought, floods—there are the reasons forcing people to leave.