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Here are some of the views of protesters in Rio
An environmental protest involving 50,000 people - some of them naked - has shut part of downtown Rio during the Rio+20 Earth summit.
The march was calling for better living conditions and greener government policies. In the midst of it all an intrepid group took their clothes off and painted their bodies with various slogans.
The text of the agreement that is likely to define the Rio+20 summit has been described as "weak" by many of those in attendance. The EU's climate change chief Connie Hedegaard tweeted that "nobody ... was happy" about the text:
The charity Oxfam likened the outcomes of the summit to "re-arranging the deck chairs" while the Titanic sinks, echoing the verdict of many NGOs.
The head of the UNFCCC - the UN convention that was agreed at the last Earth Summit in Rio 20 years ago - was disappointed that the text did not mention ending subsidies on fossil fuels.
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The government says households struggling to pay their water bills will get help through new 'social tariffs'.
Food prices are rising due to environmental factors, increased populations and, experts argue, increased financial speculation.