Weather modification, science, and governance โ In-depth analysis
Weather modification between science, power, and political gray areas
From cloud seeding in North Africa to privately funded geoengineering: the dream of controlling the weather is an old one. What is new is who is pursuing itโand under what conditions.
In summer, when heat, drought, and water shortages characterize the Mediterranean region, one question arises more and more frequently: Are humans already actively interfering with the weatherโand if so, what are the consequences for others? Between Spain and Morocco, this question has long been more than just a meteorological thought experiment. It touches on geopolitical sensitivities, scientific uncertainties, and a power vacuum that is increasingly being filled by private actors.
The return of an old promise
Weather modification sounds like science fiction, but it has been a reality for decades. Cloud seeding is considered the most established method. Aircraft or ground stations introduce particles such as silver iodide into suitable clouds to promote precipitation processes.
Morocco has been using this technique since the 1980s. In view of persistent droughts and falling groundwater levels, the programs have recently been expanded. The aim is to โactivateโ rain where natural processes appear too weak.
But the science remains sobering: even under optimal conditions, the measured effects are usually in the range of 5 to 15 percent additional precipitation. Without suitable clouds, the technique has no effect at all. Weather cannot be createdโonly modulated to a limited extent.
Beyond the border, controversy begins
Despite these limitations, there is growing concern in Spain that Moroccan measures could influence atmospheric processes across political borders. Media reports, local protests, and political inquiries reflect a diffuse unease.
Scientifically, a direct connection is hardly tenable. The atmosphere is a chaotic system in which clear cause-and-effect chains are rarely verifiable. Nevertheless, it is precisely this uncertainty that has political explosive power: what cannot be refuted remains suspicious.
This is the core of the conflict. Weather manipulation causes less measurable damage than it does loss of trust. States alter local processes to their advantage, while neighbors suspect possible side effects without being able to prove them.
When research becomes a commodity
While government weather modification is relatively old, the debate is shifting fundamentally elsewhere. Private companies are pushing into a field that was previously reserved for public research.
A prominent example is the start-up Stardust, which develops technologies in the field of solar geoengineering. The aim is to reflect a small portion of the sun’s rays in order to mitigate global warming โ for example, through aerosols in the stratosphere.
Models show that such an intervention could lower the global average temperature. However, the side effects would be distributed very unevenly across regions. Shifts in precipitation zones, changes in monsoon systems, and political conflicts are considered likely.
The decisive novelty lies less in the technology than in the actor: a privately financed company, equipped with patents, capital, and strategic influence, could offer geoengineering as a service to countries in the future.
A legal vacuum
International law is struggling to keep pace with this development. The 1977 ENMOD Convention only prohibits the military use of environmental manipulation. Civilian or commercial applications remain permitted. A moratorium on large-scale geoengineering by the UN Convention on Biological Diversity is politically binding, but not legally binding.
This creates a governance gap: technologies with potentially global impacts can be developed without clear rules on transparency, liability, or democratic control.
A particularly sensitive scenario is one in which states do not intervene themselves, but purchase interventions. Who bears responsibility when regional climate impacts occur? Who decides whether to continue or discontinue? And who owns the data?
The actual turning point
The debate surrounding Spain and Morocco shows that influencing the weather is less a question of technical feasibility than of political perception. Cloud seeding remains limited, local, and scientifically unspectacular.
The real turning point lies elsewhereโin the privatization of atmospheric interventions. When the sky becomes a market, decision-making power and risk shift equally.
In the end, the question is not whether humans can control the weather. Rather, it is an uncomfortable, as yet unresolved one:
Who decides on the procedureโand who lives with the consequences?
KK