Using the scientific method (Part 3), Better sanitary conditions:

Better control of diseases: (Part 2)
https://steemit.com/science/@afzaalsabir/using-the-scientific-method-part-2-better-control-of-diseases
It is difficult to imagine what sanitary conditions in same of our larger cities were like only one hundred years ago. Into the narrow, unpaved and poorly drained city streets household garbage and other refuse were thrown. Animals wandered through the streets, feeding upon the garbage. Outdoor toilets were common; many of them situated where human wastes drained into wells from which people obtained drinking water.

Today our city streets are paved and well drained, and they are cleaned regularly. It is against the law to throw garbage in the streets. Sewage from all sections of a city is carried through sealed pipes to disposal plants. Through the use of the scientific method it has been demonstrated that unsanitary conditions cause the spread of diseases like typhoid fever, cholera and dysentery. Today most city governments have departments of sanitation which keep the cities clean and thereby prevent the spread of certain diseases.

A century ago it was common practice in many cities to bring water by the bucketful for household use. Water had to be carried a considerable distance from the well to the home. It was therefore used very sparingly for bathing and cleaning purposes. Often it came from sources that contained disease-producing germs.

Towns and cities today have water systems that usually provide water enough for household use. One of the most important problems in the growth of cities has been to provide sufficient water to meet the many needs of an increasing population. Los Angeles has solved the problem by bringing water to the city from Colorado River, 544 kilometers away. Carried through a pipe line, or aqueduct, a thousand million liters of water are delivered to the district daily. This is a remarkable advance from the vucket system of supplying homes with water.