Where do you study? http://xxxnx.fun xnnx SIR – Sir David Attenborough blames famine in parts of the world on over-population (report, September 18). But this cannot be. Some of the most densely populated places (Hong Kong or London for example) are also among the richest. Some of the driest places (California or Saudi Arabia) again are among the richest, and the inhabitants, despite their numbers, are not dying of thirst.