A gripping new investigation into the underbelly of digital technology, which addresses the pressing question of the carbon footprint it leaves behind. In a sort of news thriller, the author reveals not only how costly the virtual world is, but how damaging it is to the environment. A simple 'like' sent from our smartphones mobilises what will soon constitute the largest infrastructure built by man. This small notification, crossing the seven operating layers of the Internet, travels around the world, using submarine cables, telephone antennas, and data centres, going as far as the Arctic Circle. It turns out that the 'dematerialised' digital world, essential for communicating, working, and consuming, is much more tangible than we would like to believe. Today, it absorbs 10 per cent of the world's electricity and represents nearly 4 per cent of the planet's carbon dioxide emissions. We are struggling to understand these impacts, as they are obscured to us in the mirage of 'the cloud'. Some telling numbers- _x2219_ If digital technology were a country, it would be the third-highest consumer of electricity behind China and the United States. _x2219_ An email with a large attachment consumes as much energy as a lightbulb left on for one hour. _x2219_ Every year, streaming technology generates as much greenhouse gas as Spain - close to 1 per cent of global emissions. _x2219_ The video of 'Gangnam Style' was viewed around 1.7 billion times, using about 297 gigawatt hours, equivalent to that of a city with a population of 100,000. _x2219_ One Google search uses as much electricity as a lightbulb left on for 35 minutes. _x2219_ An old broadband box can use as much power as a refrigerator. _x2219_ All of humanity produces five exabytes of data per day, equivalent to what we consumed from the very beginnings of the internet to 2003 - an amount that would fill 10 million Blu-ray discs which, piled up, would be as high as the Eiffel Tower. At a time of the deployment of 5G, connected cars, and artificial intelligence, The Dark Cloud, the result of an investigation carried out over two years on four continents, reveals the anatomy of a technology that is virtual only in name. Under the guise of limiting the impact of humans on the planet, is already asserting itself as one of the major environmental challenges of the twenty-first century. 'Guillaume Pitron recalls the origins of digital technology and explains how this new communication tool has catastrophic consequences on our environment ... What happens when you send an email? What is the geography of clicks? What ecological and geopolitical challenges do they bring without our knowledge? This is the subject of The Dark Cloud ... For two years, the journalist followed, on four continents, the route of our emails, our likes and our vacation photos.' -Margherita Nasi, Le Monde 'It reveals the environmental cost of a dematerialised sector. Between the strategies of the giants who keep us in the illusion of a clean Internet and the difficulty of feeling pollution that has no taste or smell, the investigator reveals the underside of the Internet.' -Marina Fabre, Novethic Praise for The Rare Metals War- ' E xposes the dirty underpinnings of clean technologies in a debut that raises valid questions about energy extraction.' -Publishers Weekly