
Why China’s giant dam on the Yarlung Tsangpo worries India
You Can’t Alter Mother Earth
China’s $167-billion hydropower project in Tibet could give Beijing greater control over Brahmaputra, a river that sustains millions downstream. India fears changes to water flows, flood risks and ecological damage, besides the strategic implications of a mega-project near its border.
China’s Three Gorges Dam Concerns
The Brahmaputra is more than a river for India. It sustains farms, fisheries, communities and ecosystems across the Northeast. But before it enters India, the river flows through Tibet, where China is building what is expected to become the world’s largest hydropower project.
The project, on the lower reaches of the Brahmaputra, has raised concerns in New Delhi over water security, disaster risks and Beijing’s growing leverage over a transboundary river. Construction began in July 2025, bringing a long-standing concern into sharper focus.
Here is why the dam matters for India.
What is China building, and where?
The Yarlung Tsangpo originates in Tibet and flows eastwards before making a dramatic U-turn around the Namcha Barwa massif. It then cuts through a deep gorge before entering Arunachal Pradesh as the Siang, which subsequently becomes the Brahmaputra in Assam and flows into Bangladesh.
The project is expected to comprise five cascade hydropower stations, with a combined installed capacity exceeding 60,000 megawatts. It could generate around 300 billion kilowatt-hours of electricity annually, more than three times the designed annual generation China’s Three Gorges Dam Concerns – Search
Beijing has presented the project as part of its clean-energy ambitions and economic development plans for Tibet. But its location, close to the Indian border, makes it a matter of strategic concern for New Delhi.
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Why is India worried about water security?
The biggest concern is not simply that China is building a dam, but that it controls the river upstream of India.
An upstream country can influence the timing and volume of water flowing downstream through reservoir operations, even if it cannot permanently stop a major river. Filling reservoirs, storing water during particular seasons or releasing it in large quantities can affect downstream flows.
A Reuters report published in August 2025, citing an Indian government analysis, said the project could potentially enable China to divert up to 40 billion cubic metres of water. Under certain assumptions, flows at a key border point could fall by as much as 85 per cent during dry months.
These are estimates of potential impacts, not evidence that such a reduction will occur. The precise consequences remain uncertain because China has not publicly provided enough detailed technical information for India to independently assess the project’s operations.
The stakes are significant. Reduced flows during dry periods could affect agriculture, fisheries and local water availability. Changes in the timing of releases could also complicate water management in Arunachal Pradesh and Assam.
However, the Brahmaputra receives substantial water from rainfall and tributaries within India. The scale of any downstream impact would therefore depend on the dam’s design, operating practices, seasonal conditions and the river’s wider hydrology.
Could China use the dam as a strategic weapon?
The concern extends beyond water availability. India and China have a contested border and a history of military tensions. A mega-project on a river entering India from Chinese-controlled territory introduces another dimension to this relationship.
In a crisis, uncertainty over reservoir operations and water releases could complicate India’s security calculations. Sudden releases during heavy rainfall could potentially worsen downstream flooding, while reduced releases could aggravate water shortages during dry periods.
This does not mean China can simply switch off the Brahmaputra or that it intends to weaponise the river. The dam’s actual capacity to alter flows will depend on its design and operation. Nevertheless, the absence of transparency creates a strategic problem: India cannot confidently assess the risks without reliable information from Beijing.
The issue is compounded by the lack of a comprehensive water-sharing treaty between India and China that allocates the Brahmaputra’s waters. The two countries have mechanisms for discussing transboundary rivers, but these do not provide the same certainty as a binding agreement on water allocation and dam operations.
What about earthquakes, floods and the environment?
The project is being constructed in a geologically active part of the eastern Himalayas, where earthquakes, landslides and extreme rainfall pose significant engineering challenges.
In July 2026, a report on research by Chinese geologists raised concerns about an active fault beneath the project site, highlighting potential risks to infrastructure stability and surrounding slopes. The finding has renewed questions about how a project of this scale can withstand the region’s geological hazards.
A major structural failure or an uncontrolled release of water could have serious consequences for communities downstream. However, such outcomes are risks to be assessed, not inevitable consequences of construction.
There are also environmental concerns. Large hydropower projects can alter sediment transport, river ecology and habitats. Changes in sediment flows could affect agriculture and ecosystems downstream, while construction could disturb fragile landscapes in Tibet.
China maintains that its hydropower development has undergone scientific assessment and will not adversely affect downstream countries. But without detailed information and independent scrutiny, India has limited means of verifying these assurances.
How is India responding?
New Delhi has raised its concerns through diplomatic channels and has called for transparency, consultation and the protection of downstream interests.
India has also been seeking hydrological data and technical details about China’s upstream projects. The absence of regular river-flow information makes it harder to forecast floods and prepare for sudden changes in water levels.
Another response is the proposed Siang Upper Multipurpose Project in Arunachal Pradesh. The project is intended to provide hydropower, water storage and a measure of protection against potential changes in upstream flows. It could also help manage flood risks.
But building another giant dam is not without costs. The proposed project faces opposition from local communities concerned about displacement, submerged villages and damage to their land and livelihoods. It also raises its own environmental and seismic safety questions.
What happens next?
The central challenge for India is to prepare for the dam’s possible consequences without treating the worst-case scenario as a certainty.
Reliable hydrological data, advance notification of reservoir operations, technical consultations and cooperation on disaster management would help reduce uncertainty. India will also need to strengthen flood forecasting and emergency preparedness across the Brahmaputra basin.
Ultimately, the Yarlung Tsangpo project is not just an energy infrastructure story. It is a test of whether two Asian powers sharing a vital river can build enough trust to manage its risks.
For India, the question is not whether China should generate hydropower, but whether a project of unprecedented scale can proceed without compromising the security and livelihoods of millions living downstream.
SOURCE Why China’s giant dam on the Yarlung Tsangpo worries India
Related video: A deep mountain river cutting through Tibet’s rugged landscape (4k Films by Adnan)
BLURRED VISION
It cost $30 billion, slowed Earth’s rotation and even changed the planet’s rotational axis and it unleashed an ecological disaster
Story by Fergus Collins
Key takeaways
- Massive Energy Production: The dam generates 22.5 GW of renewable electricity, enough for 4.5 million people, making it the world’s largest hydroelectric power station.
- Environmental Impact: Construction and operation have caused extinctions and habitat loss, including the Chinese paddlefish and baiji river dolphin, while threatening species like the Yangtze sturgeon and giant salamander.
- Human Displacement: Creation of the reservoir submerged 100,000 hectares of farmland and displaced 1.4 million people, disrupting communities despite new accommodations.
It’s one of the largest engineering projects the planet has ever seen, damming Asia’s greatest river, the Yangtze, to produce more electricity than any other single power station on Earth. What’s more, the energy generated is renewable and, once you take away construction costs, very few greenhouse gases are emitted.
China’s Three Gorges Dam, begun in 1994 and becoming fully operational in 2012, appears to be a major win in the battle against climate change while also reducing the chances of catastrophic flooding that have claimed so many lives in the past.
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And yet, the story of the mighty Three Gorges Dam – Search is not one of pure good news. Indeed, its construction and subsequent operation have had a massive impact on human communities and have altered the nature of the river to such an extent that a number of species have either gone extinct or are on the verge of vanishing from Earth.
Rising in the mountains of China’s Qinghai province on the Tibetan plateau, the Yangtze flows for 6300km to reach the East China Sea at Shanghai. Some 400 million people live within the river’s catchment and it provides about half of all the fish eaten in China and two-thirds of its rice. Industries and farming along the Yangtze contribute about 40% of China’s economy.
Its raw power has long been harnessed for energy, the water being channelled through dams to drive electricity generating turbines. Since 1950 more than 50,000 dams have been built within the river’s mighty basin. But there is nothing to compare with the Three Gorges Dam, which was constructed at a cost of over $30 billion.
At 2.3km long and 180m high it is the world’s largest hydroelectric gravity dam, and the reservoir that formed behind it is 600km long and comprises 39 billion tonnes of water. The hydroelectric power plant has a stated generating capacity of 22.5 gigawatts of electricity, enough power for 4.5 million people and dwarfing the output of a typical modern nuclear power plant.
The Three Gorges Dam in Yichang City, Hubei Province. CFOTO/Future Publishing via Getty Images
The three gorges in the dam’s name are the Qutang, Wu and Xiling gorges, and they lie upstream. Plans to construct a dam here had been mooted as early as 1919. There were several false starts but major disasters, such as the 1931 and 1954 floods that killed tens and possibly hundreds of thousands of people, encouraged further interest and then definitive plans for a dam.
As well as producing power, the proposed dam would moderate the river’s flow in monsoon season and drastically reduce the chances of serious flooding. And to a greater degree, the completed dam has achieved these aims, and given the Chinese economy a gigantic boost in the process.
But this progress has come at a cost. The creation of the dam and reservoir meant that 100,000 hectares of farmland and hundreds of villages, towns and even cities were submerged under the rising water. An estimated 1.4 million people were forced to relocate to higher ground and though new accommodation was provided, much of it was poor quality and close-knit communities were uprooted and broken apart.
The dam has also had a huge, and largely negative impact on the wild ecosystems along the river, particularly downstream of the dam. There are regular landslides both above and below the dam that affect human and wildlife communities. The dam has caused major changes to water flows that have removed important habitats, especially breeding areas, for many fish species.
The example of the Yangtze sturgeon is typical. This ancient fish, whose ancestors would have swum when the dinosaurs roamed the land, is now blocked from reaching its spawning grounds. And while the authorities herald a massive restocking project for the species, many experts believe none of these fish are able to breed and the species is living on borrowed time.
According to Yangtze River Fisheries Research Institute, fish populations of four species of carp – a crucial food fish – have declined by close to 90% due to changes in river flows. Many more fish species are under threat and it is already too late for the endemic Chinese paddlefish of the Yangtze and Yellow rivers. This huge fish with its strange snout was last seen in 2003 and has now been officially declared extinct.
Chinese River Dolphin. EarthViews Productions/getty
Gone too is the Chinese river dolphin, also known as the baiji. It’s thought that, coupled with overfishing, the massive increase in ship traffic due to the dam making the river more navigable has doomed the species.
The noise of the ships is extremely disruptive to the aquatic mammals’ ability to hunt and find mates. A similar fate may await the Yangtze finless river porpoise whose numbers have plummeted since the dam was built.
Reptiles and amphibians have fared little better. The Yangtze giant softshell turtle is now extinct while the Chinese alligator and the Chinese giant salamander face uncertain futures, again due to how the dam has changed water flows and altered the river’s interaction with flood plains and other riverine habitats crucial for these species.
On the positive side, there are some signs that the authorities, including the Chinese Three Gorges Corporation, have begun acknowledging and attempting to mitigate the impact of the dam, including stocking, and improving “environmental flows”.
Most astonishing still, at face value at least, is the notion that the creation of the dam and the elevation of such a huge amount of water, has slowed the Earth’s rotation and even changed the planet’s rotational axis. According to NASA calculations, however, the change is completely negligible, harmless, and too small to affect daily life, navigation, or standard timekeeping. Thank goodness for that, at least!
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Anthropic’s Gas Facility Emissions Match 1.3 Million Cars
Anthropic’s acquisition of a natural gas-powered facility produces annual CO₂ emissions roughly equivalent to those from 1.3 million gasoline-powered cars climatecrisis247.com.
What happened
According to Climate Crisis 247, AI company Anthropic — known for its Claude AI platform — has purchased a gas-powered energy facility that will generate enough carbon dioxide each year to match the emissions of about 1.3 million passenger vehicles climatecrisis247.com. This figure comes from comparing the facility’s annual CO₂ output to the average yearly emissions of a typical gasoline car.
Why it matters
The comparison is significant because:
- Scale: 1.3 million cars’ worth of emissions is a substantial environmental footprint, especially for a single corporate facility.
- Energy mix: The plant is not powered by renewables, meaning it will continue to rely on fossil fuels, contributing to greenhouse gas emissions and air pollution
climatecrisis247.com.
- AI infrastructure: While some AI data centers are moving toward green energy, this case shows that not all AI-related infrastructure is decarbonizing
climatecrisis247.com.
Broader context
Independent analyses of AI’s carbon footprint show that daily usage of large AI systems can already match the emissions of large fleets of vehicles App Developer Magazine. For example, one report estimated that serving billions of daily AI prompts could produce ~5.98 million tons of CO₂ annually, equivalent to 1.3 million cars
App Developer Magazine. This underscores that both training and inference (day-to-day use) of AI models carry significant environmental costs.
The UN University study also notes that day-to-day AI use accounts for 80–90% of total energy demand in AI infrastructure, and that emissions are often concentrated in specific regions while benefits are global UN News.
Implications
- Corporate responsibility: Companies like Anthropic face pressure to ensure AI infrastructure is powered by low-carbon sources.
- Policy and investment: Renewable energy adoption, efficiency improvements, and carbon pricing could reduce such emissions.
- Public awareness: Comparisons to familiar benchmarks (like car emissions) help communicate the scale of AI’s environmental impact.
In short: Anthropic’s new gas-powered facility will emit as much CO₂ annually as 1.3 million cars, highlighting the environmental cost of certain AI infrastructure choices and the need for greener energy solutions climatecrisis247.com+2.








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