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In view of the string of failed attempts by politicians to reach agreements and implement them to control greenhouse gas emissions, scientists have once again expressed their willingness to implement the designs of geoengineering experiments that have been working for years in order to cool the Earth, that is, artificially change the climate.
Ken Caldeira is a climatologist at the Carnegie Institution of Washington and considered one of the leading experts on climate change in the world.
Caldeira assured El País that "the failure of our politicians to achieve concrete measures to reduce greenhouse gas emissions is worrying scientists and causing many of them to start thinking of extreme measures."
The main concern of scientists is that the temperature of the planet increases more than 2 ° C in the remainder of the century, since at this point the consequences that this would generate would be irreversible. Among the alternatives to the task of governments, the most accepted have been geoengineering from space, the management of solar radiation and the capture of CO2.
Playing with the sun. As stated in a report to the United States government, geoengineering encompasses endless possibilities, from painting roofs and facades white to reflect solar radiation - as California tried unsuccessfully to do - to placing gigantic mirrors on the roof. space creating planetary shadow areas through the capture of CO2.
However, the most tentative option for experts is in the clouds.
In 2011, during the SPICE (Stratospheric Particle Injection for Climate Engineering) project, British engineers and climatologists were as close as ever to achieving one of these experiments. However, in its development it was paralyzed.
The goal at the time was to inject aerosols - such as sulfur dioxide - into the highest layers of the atmosphere to increase the refraction of clouds.
So that failed attempts like this do not happen again and the authorities and the general population are better informed about geoengineering, the Basque philosopher from the University of Lancaster (United Kingdom), Maialen Galarraga, has promoted the GeoE project.
"We want to make a documentary on geoengineering that is reflective, that leads people to take this issue as their own, that democratizes it"he explained to El País.
Galarraga collaborates with the British IAGP so that the proposals on how to change the climate are not only based on the calculations of climatologists or engineers.