Rio de Janeiro is laying out the welcome mat for the world. This week, it will be hosting the UN's largest ever environmental conference, Rio+20.
The conference is a test of how well this city of over six million people can accommodate the world cup in 2014, and the olympic games in 2016.
While improvements are being made to the city's transportation and sanitation systems, some community activists say Brazil is wasting money on costly extravaganzas and failing to address issues such as social development.
Al Jazeera's Rob Reynolds reports from Rio de Jainero.