FROM BBC News
Watch the video here: http://www.bbc.com/news/world-latin-america-22820979
7 June 2013 Last updated
The British prime minister is hosting a major summit aimed at tackling global malnutrition, that affects over 165 million children worldwide.
Brazil, the world's seventh largest economy, has long been known for its crippling inequality but the country's made huge improvements in recent years.
The number of Brazilians living on just $2 a day has been halved, those suffering from malnutrition has fallen from 15% of the population in the early 90s and now stands at just 7%.
Wyre Davies has been to Rio de Janeiro to find out what is being done there to tackle poverty and hunger.
