The range of technologies that are available and utilized by many of the world’s poorest people today but were far less ubiquitous fifty or a hundred years ago is considerable. Beyond medical technologies including bed nets, vaccination, and antibiotics, the list would include building materials such as cement, corrugated iron, steel wire, piping, nails, and tools; household items including plastic sheeting and containers; synthetic and cheap cotton clothing; transport technologies from rubber soles to bicycles; infrastructure services including all-weather roads and buses; water pumps,
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