In Russia it means an aging population of injecting heroin users cut off from harm-reduction support. In Japan it means one of the lowest drug-use rates on earth, offset by a stubborn methamphetamine subculture. In India it means a mostly licit-drug and cannabis problem layered on top of a fast-growing synthetic and injecting-drug crisis in the northern states. In France it means a booming, blue-collar cocaine market alongside Western Europe’s most entrenched cannabis use.