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during the stone age cavemen started farming .As they get better at farming they started growing more food than they could eat . they bought and sold the extra food in markets.
living in cities madepeople feel safe . People often lived near castles and built walls around their houses.
two hundred years ago cities started growing much faster because of the industrial revolution .People went towork in the cities because there was more money.
Mohenjo-Daro in the indus valley , in pakistan ,was one of the first cities . it was built more than 4,000 years ago . About 40,000 people livedthere . if we look at a map of Mahenjo- daro we can see the streets were strainght and that there were a lot of houses and big buildings.
About 2,000 years later the biggest city in the world was rome .it was the capital of the Roman republic and empire for a thousand years . About one million people lived there.
london was the first city to have more people than Rome . it was the biggest cityin the world between 1831 and 1925 . then New York grew bigger . Now the biggest city in the world is Tokyo.

Cavemen started farming.
people started building cities .
london was the biggest cityin the world .
Rome was the most important city in the world.
New York was bigger than london.
Tokyio is the biggest city in the world .
durante la Edad de Piedra hombres de las cavernas comenzóla agricultura. A medida que mejoran en la agricultura comenzaron a cultivar más alimentos de lo que se podía comer. se compra y se vende el alimento adicional en los mercados.
viven en las ciudadeshizo que la gente se sienta seguro. A menudo la gente vivía cerca de castillos y murallas construidas alrededor de sus casas.
hace doscientos años, las ciudades comenzaron a crecer mucho más rápidodebido a la revolución industrial. Las personas iban a trabajar a las ciudades, porque no había más dinero.
Mohenjo-Daro, en el valle del Indo, en Pakistán, fue una de las primeras ciudades. que...