A large steel wheel, 14 meters in diameter and 1.3 meters wide, could be the energy solution of the near future, generating 3.5 megawatts - enough to supply a city of 30,000 people, according to a company in the capital city of the state of Amazonas in northwest Brazil.
South America has gone from the world’s granary to the site of innumerable international infrastructure, energy and mining megaprojects. It is now facing a new dilemma: bolstering the economy with the promise of reducing inequality, in exchange for social and environmental costs that are taking their toll.