@alexnazaryan
CHARGE IT: To combat emissions from plants such as this one in South Korea, residents are given a carbon green card to track their energy use.
LEE JAE-WON/REUTERS
THERE IS a lesson about Hamlet on the whiteboard, maybe a day or two old, judging by the streaks that partially efface the names of Claudius and Ophelia. At one table, students play a game about financial literacy. At another, they leaf through newspapers. Down the hallway, rows of students sit quietly taking college placement tests, their hunched backs forming a phalanx of identical orange sweatshirts.