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According to a study conducted by scientists at Harvard and Yale Universities, a technique known as aerosol injection into the stratosphere (SAI) could halve the rate of global warming. His idea would involve spraying large quantities of sulphate particles in the lower stratosphere up to 20 km altitude.
Scientists say they would spray sulphates with the help of balloons or planes designed to reach high altitudes, or large naval style cannons. . However, they let it be known that the technique is, so far, purely hypothetical. There is no technology or adequate aircraft to carry out this experiment, but the team said the system could be created in the next 15 years.
The cost of launching the UPS system is estimated at $ 3.5 billion (USD). with operating costs of 2.25 billion USD per year
The report admits that it is a hypothetical deployment, but that its creation is possible
We make no judgment about the suitability of the inverter. We simply show that a hypothetical deployment program starting at the age of 15, although highly uncertain and ambitious, would in fact be technically feasible from an engineering point of view. It would also be very cheap.
The team recognizes that there would be an extreme risk with the system, since coordination between several countries of both hemispheres would be necessary. In addition, they argue that SAI techniques could endanger agriculture, cause drought or extreme weather conditions.
million. Gergot Wagner, Harvard University School of Engineering, and co-author of the study, said:
Given the potential benefits of halving planned increases in radiative forcing from On a given date, these figures invoke the incredible economy of solar geoengineering. Dozens of countries could fund such a program and the technology required is not particularly exotic.
The proposals also do not address the issue of increasing greenhouse gas emissions, which are one of the major causes of global warming. 19659002] The votes against
Philippe Thalmann, of the Ecole Polytechnique Fédérale de Lausanne, expert in climate change economics, said that the system would be very expensive and much riskier in the long run . [19659002] David Archer, Department of Geophysical Sciences, University of Chicago, said:
The problem of the technical climate in this way is that it is only d & # 39; a temporary dressing covering a problem that will persist forever. It would be tempting to continue to postpone the cleanliness of our energy system, but we would leave the planet as a support for life. If a future generation did not pay its climate bill, it would have all our heat at the same time.
The project has not been approved by a government or authority, and further studies would be needed to verify its validity.
This research was published in the scientific journal Environmental Research Letters.
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