The cities.

PAST.

In the first settlement houses in walled areas or in areas with natural defenses were built. It was also necessary to have water, why are normally established on the banks of a river or water source. These stable settlements led to specialization and division of labor. Emerged markets where artisans could exchange their products for different ones; a religious class was appearing and contributed to the intellectual life.

PRESENT.

As time is developing trade and industry, art and science, and played a key role in the birth of the great civilizations.

As the need arose, windows, doors and stairs were created; elsewhere similar materials were used in features and properties, which boost housing construction, side by side allowing generate villages, towns and cities, stimulating social life and community and cooperative spirit.

FUTURE. Many buildings, all too modern, perhaps

another means of more environmentally friendly transport were used, are exploited more solar energy, the very technology would open houses all with a remote control, cell phones will use advanced technology. In conclusion I think the future will be very environmentally friendly, and very technological, and given greater use of nature, many more best energy sources were found. But otherwise much advance technology in terms of weapons which cause more wars and insecurity, also anything serious water scarcity, and extinction of many species and natural resources due to the exploitation of these.