Brazilian President Luiz Inacio Lula da Silva and fellow South American leaders face pressure to set out bold solutions to save the damaged Amazon as they open a summit Tuesday on the world's biggest rainforest. Brazilian officials have vowed to seek an ambitious roadmap to stop deforestation at the two-day meeting of the Amazon Cooperation Treaty Organization in Belem, at the mouth of the Amazon river. It is the first summit in 14 years for the eight-nation group, set up in 1995 by the South American countries that share the Amazon basin: Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname and Venezuela. The summit "should deliver concrete results if the region is serious about becoming a leader in climate action," said US-based activist group Avaaz. Indigenous groups -- whose protected reservations are crucial buffers against the destruction of the world's forests, according to experts -- urged South American leaders to take bold actions.