BEIRUT — When Hani Darwish rolled down his car window hoping to cool off from Beirut’s hot afternoon, he was instantly met with the sickly sweet rotting smell of the Lebanese capital’s newest inhabitant: uncollected garbage. Despite the stench, Darwish braved the deadlocked traffic and drove his Uber van around the city for four hours Friday, Earth Day, so he could collect recyclable items and help fix Lebanon's trash crisis.