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Top Italian Scientists Debunk ‘Man-Made Global Warming’

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To Your Excellences:

President of the Republic

President of the Senate

President of the Chamber of Deputies

President of the Council



We the undersigned, citizens and scientists, warmly invite our political leaders to adopt environmental protection policies consistent with scientific knowledge. It is particularly urgent to combat pollution where it occurs as indicated by the best available science. In this regard, it is deplorable to see delay   in reducing anthropogenic pollutant emissions in both land and sea using the rich knowledge made available by the world of research.


However, we must become aware that carbon dioxide itself is not a pollutant. On the contrary, it is indispensable for life on our planet.


In recent decades, the thesis has spread that the heating of the Earth’s surface of around 0.9° C observed from 1850 onwards would be anomalous and caused exclusively by human activities, particularly by CO2 emissions from the use of fossil fuels in the atmosphere. This is the anthropic global warming thesis promoted by the United Nation’s Intergovernmental Panel on Climate Change (IPCC). They claim it will produce environmental changes so serious as to cause enormous damages in an imminent future unless drastic and expensive mitigation measures are not immediately adopted. In this regard, many nations around the world have joined programs to reduce carbon dioxide emissions and are also pressed by a relentless propaganda to adopt increasingly demanding programs whose implementation place heavy burdens on the economies of individual member states. They claim that climate control, and therefore the “salvation” of the planet, would depend on it.


However, the anthropic origin of global warming is an unproven hypothesis deduced only from some climate models, that is, from complex computer programs called General Circulation Models.


On the contrary, the scientific literature has increasingly highlighted the existence of a natural climatic variability that such models are unable to reproduce. This natural variability explains a substantial part of the global warming observed since 1850. Therefore, the anthropic responsibility for climate change observed in the last century is unjustifiably exaggerated and the corresponding catastrophic predictions are unrealistic.


The climate is the most complex system on our planet and so needs to be addressed with methods that are adequate and consistent with its level of complexity. Climate simulation models do not reproduce the observed natural variability of the climate, and in particular, do not reconstruct the warm periods of the last 10,000 years. These periods were repeated about every thousand years and include the well-known Medieval Warm Period, the Roman Hot Period, and generally warm periods during the Holocene Optimal. These past periods were also warmer than the present period despite their CO2 concentration being lower than the current one while related to the millennial cycles of solar activity. The models do not reproduce these effects.


It should be remembered that the heating observed since 1900 actually started in the 1700s, i.e., at the minimum of the Little Ice Age, the coldest period of the last 10,000 years (corresponding to the millennial minimum of solar activity, which astrophysicists call Maunder Minimal Solar). Since then, solar activity, following its millennial cycle has increased by heating the earth’s surface. Furthermore, the models fail to reproduce the known climatic oscillations of about 60 years. These were responsible, for example, for a warming period (1850-1880) followed by a cooling period (1880-1910), a heating (1910-40), a cooling (1940-70) and a new warming period (1970-2000) similar to that observed 60 years earlier. The following years (2000-2019) did not see the increase, predicted by the models, of about 0.2° C per decade, but a substantial climatic stability sporadically interrupted by the rapid natural oscillations of the equatorial Pacific Ocean, known as the El Nino Southern Oscillations, like the one that led to temporary warming between 2015 and 2016.


The media also claim that extreme events such as hurricanes and cyclones have increased at an alarming rate. Instead, like many climate systems, these events have been modulated since the aforementioned 60-year cycle. For example, if we consider the official data from 1880 on tropical Atlantic cyclones that hit North America, they appear to have a strong 60-year oscillation correlated with the Atlantic Ocean’s thermal oscillation called Atlantic Multidecadal Oscillation. The peaks observed per decade are compatible with each other in the years 1880-90, 1940-50 and 1995-2005. From 2005 to 2015, the number of cyclones decreased precisely following the aforementioned cycle. Thus, in the period 1880-2015, there is no correlation between the number of cyclones (which oscillates) and CO2 (which increases monotonically).


The climate system is not yet sufficiently understood. Although it is true that CO2 is a greenhouse gas, according to the same IPCC, the climate’s sensitivity to a CO2 increase in the atmosphere is still extremely uncertain. It is estimated that a doubling of the concentration of atmospheric CO2 from the roughly pre-industrial 300 ppm to 600 ppm can raise the average temperature of the planet from a minimum of 1° C to a maximum of 5° C. This uncertainty is enormous. In any case, many recent studies based on experimental data estimate that climate sensitivity to CO2 is considerably lower than estimated by IPCC models.


Now then, it is scientifically unrealistic to attribute to humans the responsibility for the warming observed from the past century to today. Therefore, the alarmist forecasts are not credible because they are based on models whose results contradict the experimental data. All the evidence suggests that these models overestimate the anthropic contribution and underestimate the natural climatic variability, especially the one induced by the sun, moon, and ocean oscillations.

Finally, the media spread the message that there would be an almost unanimous agreement among scientists with regard to the anthropic cause of the current climate change, and that therefore the scientific debate on this point is closed. However, first of all, we must understand that the scientific method dictates that it is facts, rather than the number of adherents, that turn a conjecture into a consolidated scientific theory.


At any rate, the alleged consensus does not exist. In fact, there is a remarkable variability of opinions among specialists – climatologists, meteorologists, geologists, geophysicists, astrophysicists – many of whom recognize that an important natural contribution to global warming was observed from the pre-industrial period and even from the post-war period to this day. There have also been petitions signed by thousands of scientists who have expressed dissent with the conjecture on anthropic global warming. These include the one promoted in 2007 by the physicist F. Seitz, former president of the American National Academy of Sciences, and the one promoted by the Non-governmental International Panel on Climate Change (NIPCC) whose 2009 report concludes that, “Nature, not human activity, rules the climate.”


In conclusion, given the crucial importance of fossil fuels for the energy supply of humanity, we suggest that we do not adhere to policies of uncritical reduction of carbon dioxide emissions into the atmosphere on the illusory pretense of governing the climate.


Rome, June 17, 2019



1. Uberto Crescenti, Professor Emeritus of Applied Geology, University G. D’Annunzio, Chieti-Pescara, former Dean and President of the Italian Geological Society.

2. Giuliano Panza, Professor of Seismology, University di Trieste, Accademia dei Lincei and Accademia dei XL (Italy’s National Academy of Sciences), 2018 International Award from the American Geophysical Union.

3. Alberto Prestininzi, Professor of Applied Geology, University La Sapienza, Roma, former Scientific Editor in Chiefof IJEGE international journal and Director of the Italy’s Research Center for Prediction and Control of Geological Risks.

4. Franco Prodi, Professor of Atmospheric Physics, University of Ferrara.

5. Franco Battaglia, Professor of Physical Chemistry, University of Modena; Galileo Movement 2001.

6. Mario Giaccio, Professor of Technology and Economy of Energy Sources, University G. D’Annunzio, Chieti-Pescara, former President of the Department of Economics.

7. Enrico Miccadei, Professor of Physical Geography and Geomorphology, University G. D’Annunzio, Chieti-Pescara

8. Nicola Scafetta, Professor of Atmospheric Physics and Oceanography, University Federico II, Napoli.


9. Antonino Zichichi, Professor Emeritus of Physics, University di Bologna, Founder and President of the Scientific Culture Center Ettore Majorana of Erice.

10. Renato Angelo Ricci,Professor Emeritus of Physics, University di Padova, former President of the Italian Society of Physics and the European Society of Physics; Galileo Movement 2001.

11. Aurelio Misiti, Professor of Sanitary-Environmental Engineering, University La Sapienza di Roma, former President of the School of Engineering, and of Italy’s Superior Council of Public Works.

12. Antonio Brambati, Professor of Sedimentology, University di Trieste, Project Manager of PNRA’s Paleoclimate-Sea, former President of the National Commission of Oceanography
13. Cesare Barbieri, Professor Emeritus of Astronomy, University of Padua.
14. Sergio Bartalucci, Physicist, President of the Italian Research Scientists and Technologists Association.

15. Antonio Bianchini, Professor of Astronomy, University of Padua.

16. Paolo Bonifazi, former Director of the Institute of Interplanetary Space Physics, National Astrophysics Institute.

17. Francesca Bozzano, Professor of Applied Geology, Sapienza University of Rome, Director of the CERI Research Center.

18. Marcello Buccolini, Professor of Geomorphology, University G. D’Annunzio University, Chieti-Pescara.

19. Paolo Budetta, Professor of Applied Geology, University of Naples.

20. Monia Calista, Researcher in Applied Geology, University G. D’Annunzio, Chieti-Pescara.

21. Giovanni Carboni, Professor of Physics, Tor Vergata University, Rome; Galileo Movement 2001.

22. Franco Casali, Professor of Physics, University of Bologna and Bologna Academy of Sciences.

23. Giuliano Ceradelli, Engineer and climatologist, ALDAI.

24. Domenico Corradini, Professor of Historical Geology, University of Modena.

25. Fulvio Crisciani, Professor of Geophysical Fluid Dynamics, University of Trieste and Marine Sciences Institute, CNR, Trieste.

26. Carlo Esposito, Professor of Remote Sensing, La Sapienza University, Rome.

27. Mario Floris, Professor of Remote Sensing, Padova University.

28. Gianni Fochi, Chemist, Scuola Normale Superiore of Pisa; scientific journalist.

29. Mario Gaeta, Professor of Volcanology, La Sapienza University, Rome.

30. Giuseppe Gambolati, Fellow of the American Geophysical Union, Professor of Numerical Methods, University of Padua.

31. Rinaldo Genevois, Professor of Applied Geology, University of Padua.

32.Carlo Lombardi, Professor of Nuclear Plants, Polytechnic University of Milan.

33. Luigi Marino, Geologist, Geological Risk Forecasting and Control Research Center, University La Sapienza, Rome.

34. Salvatore Martino, Professor of Seismic Microzonation, University La Sapienza, Rome.

35. Paolo Mazzanti, Professor of Satellite Interferometry, University La Sapienza, Rome.

36. Adriano Mazzarella, Professor of Meteorology and Climatology, University of Naples.

37Carlo Merli, Professor of Environmental Technologies, University La Sapienza, Rome.

38. Alberto Mirandola, Professor of Applied Energetics and President of the PhD in Energetics Research, University of Padua.

39. Renzo Mosetti, Professor of Oceanography, University of Trieste, former Director of the Department of Oceanography, OGS Institute, Trieste.

40. Daniela Novembre, Researcher in Mining Geo-resources and Mineralogical-petrographic Applications, University G. D’Annunzio, Chieti-Pescara.

41. Sergio Ortolani, Professor of Astronomy and Astrophysics, University of Padua.

42. Antonio Pasculli, Researcher in Applied Geology, University G. D’Annunzio, Chieti-Pescara.

43. Ernesto Pedrocchi, Professor Emeritus of Energetics, Milan Polytechnical University.

44. Tommaso Piacentini, Professor of Physical Geography and Geomorphology, University G. D’Annunzio, Chieti-Pescara.

45. Guido Possa, Nuclear engineer, formerly Deputy Minister Miur.

46. Mario Luigi Rainone, Professor of Applied Geology, University of Chieti-Pescara.

47. Francesca Quercia, Geologist, Research Director, Ispra.

48. Giancarlo Ruocco, Professor of Structure of Matter, University La Sapienza, Rome.

49. Sergio Rusi, Professor of Hydrogeology, University G. D’Annunzio, Chieti-Pescara.

50. Massimo Salleolini, Professor of Applied Hydrogeology and Environmental Hydrology, University of Siena.

51. Emanuele Scalcione, Head of Regional Agrometeorological Service Alsia, Basilicata.

52. Nicola Sciarra, Professor of Applied Geology, University G. D’Annunzio, Chieti-Pescara.

53. Leonello Serva, Geologist, Director of Geological Services of Italy; Galileo Movement 2001.

54. Luigi Stedile, Geologist, Geological Risk Review and Control Research Center, University La Sapienza, Rome.

55. Giorgio Trenta, Physicist and Doctor, President Emeritus of the Italian Association of Medical Radiation Protection; Galileo Movement 2001.

56. Gianluca Valenzise, Research Director, National Institute of Geophysics and Volcanology, Rome.

57. Corrado Venturini, Professor of Structural Geology, University of Bologna.

58. Franco Zavatti, Researcher in Astronomy, University of Bologna.

59. Achille Balduzzi, Geologist, Agip-Eni.

60. Claudio Borri, Professor of Construction Sciences, University of Florence, Coordinator of the International Doctorate in Civil Engineering.

61. Pino Cippitelli, Geologist Agip-Eni.

62. Franco Di Cesare, Manager, Agip-Eni.

63. Serena Doria, Researcher in Probability and Mathematical Statistics, University G. D’Annunzio, Chieti-Pescara.

64. Enzo Siviero, Professor of Bridges, University of Venice, Rector of the University e-Campus.

65. Pietro Agostini, Engineer, Association of Scientists and Technologists for Italian Research.

66. Donato Barone, Engineer.

67. Roberto Bonucchi, Teacher.

68. Gianfranco Brignoli, Geologist.

69. Alessandro Chiaudani, Ph.D. agronomist, University G. D’Annunzio, Chieti-Pescara.

70. Antonio Clemente, Researcher in Urban Planning, University G. D’Annunzio, Chieti-Pescara.

71. Luigi Fressoia, Urban planning architect, Perugia.

72. Sabino Gallo, Nuclear engineer.

73. Daniela Giannessi, First Researcher, Ipcf-Cnr, Pisa.

74. Roberto Grassi, Engineer, Director of G&G, Rome.

75. Alberto Lagi, Engineer, President of Restoration of Damaged Complex Plants.

76. Luciano Lepori, Ipcf-Cnr researcher, Pisa.

77. Roberto Madrigali, Meteorologist.

78. Ludovica Manusardi, Nuclear physicist and scientific journalist, Ugis.

79. Maria Massullo, Technologist, Enea-Casaccia, Rome.

80. Enrico Matteoli, First Researcher, Ipcf-Cnr, Pisa.

81. Gabriella Mincione, Professor of Sciences and Techniques of Laboratory Medicine, University G. D’Annunzio, Chieti-Pescara.

82. Massimo Pallotta, First Technologist, National Institute for Nuclear Physics.

83. Enzo Pennetta, Professor of Natural Sciences and Scientific Disseminator.

84. Franco Puglia, Engineer, CCC President, Milan.

85. Nunzia Radatti, Chemist, Sogin.

86. Vincenzo Romanello, Nuclear engineer, Research Center, Rez, Czech Republic.

87. Alberto Rota, Engineer, Researcher at Cise and Enel.

88. Massimo Sepielli, Research Director, Enea, Rome.

89. Ugo Spezia, Engineer, Industrial Safety Manager, Sogin; Galileo Movement 2001.

90. Emilio Stefani, Professor of Plant Pathology, University of Modena.

91. Umberto Tirelli, Visiting Senior Scientist, Istituto Tumori d’Aviano; Galileo Movement 2001.

92. Roberto Vacca, Engineer and scientific writer.



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Positions and concepts emitted are the sole responsibility of their authors.

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