By Rebecca Henschke
Developing countries are hoping to agree on proposals to create what they say would be a fairer international trade system at a meeting in Indonesia.
Developing nations say they are hurt by unjust deals
The talks are being hailed as an opportunity to kick-start the World Trade Organisation's stalled Doha Round of negotiations.
The G33 group of developing nations may agree on proposals for agricultural protections and exemptions.
Global charity Oxfam has accused the US and EU of bullying poorer nations.
The meeting will be attended by the director-general of the WTO, Pascal Lamy, and the EU's Trade Commissioner Peter Mandelson.
Opening the talks in Jakarta, Indonesian President Susilo Bambang Yudhoyono urged developing nations to remain united, saying it is their right and responsibility to protect their farmers from falling victim to an unjust trade regime.
Rich nations, he went on, bear the main responsibility to ensure a breakthrough in global free trade talks.
The Doha Round of trade negotiations stalled seven months ago, largely because of disputes over the developed world's tariff protections.