The outgoing government of Peruvian President Alan García has suspended construction of the Inambari hydroelectric complex, part of an energy deal with Brazil. But activists say the move is merely aimed at calming tempers among local people opposed to the dam, while handing the problem on to García's successor, president-elect Ollanta Humala.
Michael Lawrenchuk, a Cree political activist from Canada, was given a standing ovation at the International Hydropower Association congress held in this Brazilian border town, after depicting the suffering of his people since dams began to be built on rivers across their land.
The diplomatic offensive undertaken by Cuba in recent weeks is propping up the most important medium-term development programmes implemented as part of what the Raúl Castro government describes as the "updating" of the economic system without abandoning socialism.
The Amazonian town of Mutum-Paraná, in the northern Brazilian state of Rondônia, is disappearing. Its last remaining buildings must be dismantled before it is flooded by the construction of the Jirau hydroelectric dam on the Madeira River.
The Yacyretá hydroelectric dam run by Argentina and Paraguay is fully operational, supplying the energy it was designed to provide when it was built 40 years ago. But critics complain about severe social and environmental impacts.
The rage was proportional to the size of the crowd cornered between the jungle and the wall that will dam up the Madeira River in northwest Brazil. Over the space of three days, workers set fire to some 50 buses and other vehicles, work installations and even their own lodgings, which were built to house 16,000 people.
They represent just seven percent of the workers building the Santo Antonio hydroelectric dam on the Madeira River, which cuts across the Amazon jungle in northwest Brazil. But the women workers total 1,200, and many of them have had to break down barriers to jobs seen as the preserve of men.
Arturo Sánchez, 72 years old and nearly blind, dreams of bringing ecotourism to Cachuela Esperanza, a Bolivian town of 1,336 people on the Beni river, and hopes the construction of a huge hydroelectric dam will give a boost to his dreams.
Although Brazil's international development funds are still small compared to those of the industrialised world, the South American giant's foreign aid has grown considerably in the last eight years, and the country has gone from beneficiary of development assistance to donor.
Emerging countries like Brazil and China are building numerous hydroelectric dams at home and abroad to help drive their economic growth. But while in Latin America the phenomenon is touted as an integration process, in Asia it has generated tension over the shared use of rivers.
"A disappointment" was his first impression of his new city. It was small, half the size of his hometown of Barretos, and had "weak lights," says Marcelo Pelegrini, remembering his family's move to this southern Brazilian city when he was nine years old, after his father got a job transfer.
The Xingu river flows around small isles and islands and across rapids and waterfalls in Brazil's Amazon jungle, and has a dramatically reduced flow during dry season. Navigating it presents constant hurdles and risks.
"She's crazy" said most of the husbands and other family members of the 34 women who decided to become operators of sugarcane harvesters in the southern Brazilian state of São Paulo, attracted by the opportunity of better pay and encouraged by the growing mechanisation of the industry.
The roads are exceptionally good and numerous here, in contrast with other parts of Brazil, but the monotony of the landscape is not inviting to tourists. Sugar cane fields stretch to the horizon along a 400-km stretch of highway to the north of São Paulo.
The growing presence of Chinese and Brazilian capital in Latin America's energy sector is facilitating the construction of hydroelectric complexes, but is also the fuelling nationalist stances that are adding to the environmental criticisms of those major projects.
It is mere ignorance that stands in the way of Brazil having a broad network of navigable waterways and leads to the wasted potential of the country's great rivers, laments José Alex de Oliva, superintendent of inland navigation at Brazil's national waterways transport regulator (ANTAQ).
Brazil hopes to eventually become a major producer of palm oil, thanks to the expansion of this new exotic monoculture crop in the eastern Amazon jungle, where eucalyptus plantations are also mushrooming on broad swaths of already deforested land.
"We want real compensation," said Luis Nascimento de Freitas, a fisherman from Vila Teotonio, a ramshackle town on the banks of the Madeira River that will be flooded when the Santo Antonio hydroelectric plant is completed.
Brazil's state-owned oil company Petrobrás maintains a solid and vigorous presence in natural gas production within Bolivian territory, even with the nationalisation of petroleum and gas in 2006 led by Bolivia's left-wing President Evo Morales.
A land route to the Pacific, long coveted by Brazil, would not reduce the cost of transporting Brazilian exports to China and other markets in Asia and would not make them more competitive, as advocates of paving roads and building bridges through the Amazon jungle argue.
Bridges, railroads, petrochemicals, steel mills, electricity, aqueducts, agriculture, meat-processing plants, ship building and even cable cars: Brazil's powerful entrepreneurial arm is reaching towards the Caribbean, via Venezuela, where the Hugo Chávez government is working to build what it calls "21st century socialism."