The City great expansion began... by AndreasK
The City great expansion began in the 20th century with the industrialization, which brought even more immigrants like Arabs and Jews. Today São Paulo is the largest city in South America and one of the largest in the world and like other large metropolitan areas has its share of traffic jams, pollution, poverty and noise.The city has some 16 million inhabitants, 3 million cars and 300 000 trucks and buses. In heavily industrialized São Paulo, the average particulate level is 82 micrograms per cubic meter. For comparison, the annual average PM-10 in the largest 50 U.S. metropolitan areas ranges between 30 and 60 micrograms per cubic meter. Researchers found that when particulates in Sao Paulo increased by 100 micrograms per cubic meter, the overall death rate increased by about 13%.