The use of natural phenomena for strategic threats or military purposes has been discussed and practiced in history and modern times, but this method involves complex ethical, legal, and technical challenges. The following analyzes its possibilities and limitations from different angles： --- ###**1. Historical cases and theoretical discussions** 1. **Weather Weapon (Weather Warfare)** -**Case **: During the Vietnam War, the US military carried out “Operation Popeye” to extend the monsoon season through artificial rainfall and destroy Vietnam's supply lines (Ho Chi Minh Trail). This is a rare publicly recognized case of meteorological warfare. -**Limitations**: Meteorological control technology is still immature, and the natural climate system is highly complex, and human intervention may cause uncontrollable chain reactions (such as ecological disasters). 2. **Seismic and geological weapons** -**Theory**: During the Cold War, the United States and the Soviet Union studied the possibility of inducing earthquakes or tsunamis through underground nuclear explosions, but it has not been proven to be effective. -**Technical bottleneck**: The energy scale of the geophysical system is far beyond human technical capabilities, and precise control is almost impossible. 3. **Biological and ecological means** -**Cases**: The use of insects to spread diseases (such as the use of fleas to spread plague in Japan during World War II), the introduction of invasive species to destroy enemy agriculture, etc. - **Ethical disputes**: Such methods may be regarded as crimes against humanity, and ecological damage may spread to innocent areas for a long time. --- ###**2. The potential of modern technology** 1. **Directional climate engineering** -Changing the local climate through solar radiation management (SRM) or carbon dioxide removal (CDR) technologies may affect the enemy's agriculture or energy system, but international treaties (such as the Environmental Modification Convention, ENMOD) expressly prohibit military use. 2. ** "Weaponization” of natural disasters** -For example, blocking enemy military operations through man-made floods, mountain fires, or avalanches, but requires highly accurate geographic and meteorological data support, and may violate international humanitarian law. 3. **Utilization of natural phenomena in information warfare** -Spreading false natural disaster warnings (such as fictitious tsunamis or volcanic eruptions), creating social panic or disturbing enemy decision-making, belongs to the category of psychological warfare, with a low technical threshold but significant effects. --- ###**3. The unpredictability and risk of strategic threats** 1. **Uncontrollability** -Natural phenomena have systematic characteristics, and local intervention may cause global disasters (such as drought in neighboring countries caused by artificial rainfall), and even devour one's own. 2. **Legal and ethical risks** -International laws such as the Charter of the United Nations and the Geneva Conventions expressly prohibit the use of weapons that may cause large-scale environmental damage. If it is revealed, it may lead to international sanctions or public condemnation. 3. **Tactical alternatives** -In modern warfare, technologies such as cyberattacks, drone swarms, or artificial intelligence-assisted decision-making are easier to achieve “unpredictability”, and there are fewer legal gray areas. --- ###**4. Alternative strategies: defensive utilization of natural phenomena** 1. **Strengthening of geographical barriers** -The use of natural topography such as mountains and rivers to build fortifications (such as the ancient Great Wall of China relying on the topography) is a passive defense rather than an active threat. 2. **Ecological early warning system** -By monitoring natural disasters such as earthquakes and typhoons, and deploying emergency responses in advance, the enemy's opportunity to attack through natural disasters is weakened. --- ###**Conclusion** The use of natural phenomena as a strategic threat is theoretically possible, but it is subject to multiple constraints of technology, ethics, and international law. In modern warfare, a more feasible strategy is to combine information warfare and psychological warfare to create uncertainty through the “combination of reality and reality”, rather than directly manipulating natural systems. In addition, any means involving environmental destruction may cause a humanitarian disaster and ultimately damage the international credibility and long-term interests of the sponsors of the strategy.