University of Cambridge. "Decline of bronze age 'megacities' linked to climate change." ScienceDaily Citat: "...Scientists have demonstrated that an abrupt weakening of the summer monsoon affected northwest India 4,100 years ago. The resulting drought coincided with the beginning of the decline of the metropolis-building Indus Civilization, which spanned present-day Pakistan and India, suggesting that climate change could be why many of the major cities of the civilization were abandoned..."
