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Missing Maps: what is Baraka ... and how can you help map it?Che Guevara kicked around Baraka, in the Democratic Republic of Congo, in the 1960s. Now it is a thriving trading city – but still lacks a basic digital map. Guardian readers are setting out to change that -
Murder capitals of the world: how runaway urban growth fuels violenceSan Pedro Sula, Honduras, is the most dangerous city on the planet – and experts say it is a sign of a global epidemic -
How one Brazilian slum is blurring the boundary between forest and cityVila Brasilândia, a slum city on the edge of São Paulo, has found unconventional ways to tackle urbanisation, resource scarcity and climate change
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Nairobi’s female slum dwellers march for sanitation and land rightsA year on from launching lawsuits, slum dwellers are taking their demands for clean water, toilets and housing to the health ministry, writes Mark Anderson -
Tackling São Paulo's crack cocaine epidemic – in picturesSão Paulo is changing its approach to tackling drug addiction. Hospitalisation and police interventions have given way to a programme that provides food, housing and jobs for addicts
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Controversial São Paulo project offers jobs to crack addicts in CracolândiaSão Paulo’s Open Arms programme offers crack addicts a controversial route to rehabilitation, providing work and housing but not requiring them to give up drugs. Sarika Bansal reports
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