The construction of the Don Sahong Dam in Laos PDR must be halted until full information on the project's impacts - in particular the fate of millions of fish that migrate each year through the Hou Sahong channel now being dammed - has been published, writes the Save the Mekong Coalition in this open letter sent today to the project developers.
Renewable energy may play a huge part in helping to achieve the ambitions of the Paris Agreement, now in force and under discussion at COP22 climate talks in Marrakesh, writes Steffen Böhm. But it can never be the whole story, and nor does it relieve the need for deeper changes in how the world works.
A new dam on indigenous lands at Muskrat Falls will join a network of other hydroelectric projects spanning Innu territories across the Labrador-Quebec peninsula, writes Colin Samson. The continual violation of Innu rights imperils their ability to enjoy healthy and sustainable lifestyles - and follows in a long tradition of indigenous land theft in North America.
The free-flowing Salween is the last big undammed river in Southeast Asia, home to a flurry of endangered species including tigers and clouded leopards, writes Tom Fawthrop in Hpa-an, Karen State, Myanmar. And thanks to support from both the indigenous Karen people, and senior officials in China who see the huge ecotourism potential of the river and its dramatic gorge, it could just stay that way.
Disregarding revelations of systemic political corruption in Brazil's hydropower sector, President Dilma Rousseff is ploughing ahead with a cascade of giant dams on the mighty Tapajos river. Among the companies touting to win huge construction contracts are France's EDF and Engie, and Germany's Voith and Siemens - in a consortium led by Brazil's Electrobras, which stands accused of high-level corruption over four other dam projects.
Dam builders have a new mantra, writes Tom Fawthrop: 'sustainable hydropower'. Repeated at every opportunity, it is based on the unproven idea that large dams can be made 'sustainable' by promising future 'mitigation'. And so it is at the Don Sahong dam in Laos which is about to devastate the mighty Mekong and the 60 million people who depend on it for food and livelihood.
A spate of hydroelectric dam building in Nepal means that future earthquakes could send inland tsunamis flooding down the steep mountain valleys, writes Michael Buckley. Disaster was averted in last month's quake - a badly damaged dam was not yet filled. But despite the risks and the damage to river ecology, tourism and rural livelihoods, there's no sign of any policy shift.
For the world's multinational corporations, the climate crisis is just another business opportunity, writes Philippa de Boissière. One example is Enel-Endesa's 'climate friendly' 217m high El Quimbo dam in Colombia - a huge exercise in expropriation at taxpayer expense, backed by police violence against strong local resistance.
The Mekong is among Southeast Asia's greatest rivers, sustaining tens of millions from its abundant fisheries and its floodwaters which both irrigate and fertilise. But as Tom Fawthrop reports, Nature's bounty, and beauty, are at risk from a series of 11 dams.