As they get richer they become more literate, which fuels information growth, notes Mr Cortada.
随着他们更加富有，他们变得更有文化，这推动了信息增长，科尔塔达先生指出。
Between 1990 and 2005 more than 1 billion people worldwide entered the middle class. As they get richer they become more literate, which fuels information growth, notes Mr Cortada.
Cortada先生说，在1990年和2005年之间，有十亿人成了中产阶级，当他们变得更富有，他们也变得更能使用文字，因此为信息膨胀火上加油。
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