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Years Growth Of City: Lateral growth in trees frequently begins later than growth in height, but the period of lateral growth is longer. Rates of lateral growth likewise are low at the outset, increasing after a few weeks and then diminishing. In view of the long annual period of lateral growth in trees, deleterious environmental conditions may exercise a pronounced effect on growth. In the wood of trees of temperate regions, narrow and wide growth rings may be observed, marking years growth of city characterized by unfavorable and favorable conditions for growth.
The problem of human growth—the population explosion—must be understood in the same context as the growth of populations of other organisms. At present the human population is in a growth phase with a mean doubling time of about 25 years growth of city. Although the number of humans an double every 25 years growth of city, the food supply cannot Jo so indefinitely.
There was some urban growth in the late 15th century after the Aqua Virio was restored in 1453, but for 133 years growth of city this was the only aqueduct that served the city. Only during the pontificate of Sixtus V (1585-1590) did Rome begin to expand significantly; in 1600 its population had reached 100,000. The following 150 years growth of city was a great period of urban planning. The Campus Martius was transformed by the laying out of new streets, such as the Via Condotti'and the Via Alessandrina, and new squares, notably the Piazza Farnese. The medieval appearance of the city was also transformed with new palaces, churches, fountains, and obelisks. |
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