This article was originally published in Rest of World, which covers technology’s impact outside the West. For three years, Juan Vega sped across Cartagena, on Colombia’s Caribbean coast, on his electric motorcycle – one of thousands of recent converts to the environment-friendly option. When he needed to replace the lithium battery last year, however, he found he had few options to dispose of it safely. “I asked the people who sold me the bike, and they said they don’t dispose of batteries,” Vega, 41, told Rest of World. He went to his regular auto workshop but they, too, declined to…