Global Scans · Nuclear winter · Weekly Summary

A global catastrophic risk is a hypothetical future event that has the potential to damage human well-being on a global scale. Some events could cripple or destroy modern civilization. Any event that could cause human extinction is known as an existential risk.

• [New] Similar to Japan, Taiwan has limited land mass that could potentially be contaminated in the event of a nuclear disaster, as occurred in Fukushima prefecture. New Bloom Magazine
• [New] The United States could provide India with a reliable thermonuclear weapon design. Foreign Affairs Magazine
• [New] In the absence of a clear, coordinated plan to deal with Russia's escalating nuclear threats, western leaders have edged us closer to the nuclear disaster they are seeking to avoid. The Guardian
• Short of finding some way to remake the Martian environment (Musk has proposed immolating the planet with thermonuclear warheads to catalyze a runaway greenhouse effect), the actual experience of life on Mars is likely to be more complicated, and not in any way that could be described as good. NOEMA
• The risk of nuclear reactors for energy is far lower than the risk incurred in the case of thermonuclear war. UW-Madison MacArthur Fellow warns of nuclear fallout ri
• The US plans to start volume production of its newest B61 - 13 thermonuclear bombs later in May, almost a year ahead of schedule. Mehr News Agency
• A large-scale nuclear war between the USA and Russia could kill 200 million people or more in the near term and potentially cause a global 'nuclear winter' that could kill 5 to 6 billion people, threatening the survival of humanity. Countercurrents.org
• Nuclear winter effects could severely disrupt agriculture and fisheries worldwide, with Northern hemisphere high-latitude regions such as the Nordics facing especially acute risks. Pugwash Conferences on Science and World Affairs
• The largest human project ever actually entered its final reactor phase; the International Thermonuclear Experimental Reactor, a joint tokamak project undertaken by 34 countries in southern France, continues its development, though it's unlikely to be operational until at least 2039. BGR
• At an estimated cost of $22 billion, the International Thermonuclear Experimental Reactor is the world's biggest bet on fusion energy: a project so daunting in scale that longtime geopolitical rivals have pooled their resources to share in its potential risks and rewards. CNet
• Even without a functioning nuclear warhead, the Iranian military could still disperse radiological material through a dirty bomb. MIRA Safety
• In 2025, the deployment of large-scale facilities such as the International Thermonuclear Experimental Reactor is expected to reach critical milestones, with neutron yield and spectral measurements playing a central role in validating plasma performance and tritium breeding efficiency. Image2003.com
• Even a limited war between India and Pakistan could cause a nuclear winter that could kill over two billion people. Pearls and Irritations
• When the U.S. begins building out its Golden Dome missile defence network, which would be the world's supreme shield against missile attacks, it will have many more options to defeat a Russian thermonuclear bomb heading into space. Forbes

Last updated: 02 August 2026