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Therefore, those who want diamonds are willing to pay a higher price for one diamond than for one glass of water, and sellers of diamonds ask a price for one diamond that is higher than for one glass of water. Conversely, a man dying of thirst in a desert would have greater marginal use for water than for diamonds so would pay more for water ...
The Ancient Greeks of Athens and Asia Minor also used an indoor plumbing system, used for pressurized showers. [29] The Greek inventor Heron used pressurized piping for fire fighting purposes in the City of Alexandria. [30] An inverted siphon system, along with glass covered clay pipes, was used for the first time in the palaces of Crete, Greece.
Plentiful water and the enrichment of the soil due to annual floods made it possible to grow excess crops beyond what was needed to sustain an agricultural village. This allowed some of the people to engage in non-agricultural activities, such as the construction of buildings and cities (the root of the word "civilization"), metalworking, trade ...
The Ptolemaic system of celestial motion as depicted in the Harmonia Macrocosmica (1661). Science in classical antiquity encompasses inquiries into the workings of the world or universe aimed at both practical goals (e.g., establishing a reliable calendar or determining how to cure a variety of illnesses) as well as more abstract investigations belonging to natural philosophy.
In 1967, Roderick Nash published Wilderness and the American Mind, a work that has become a classic text of early environmental history.In an address to the Organization of American Historians in 1969 (published in 1970) Nash used the expression "environmental history", [4] although 1972 is generally taken as the date when the term was first coined. [5]
Giving earth and water, they recognized the Persian authority over everything; even their lives belonged to the king of Persians. [citation needed] Then negotiations would take place to specify the obligations and the benefits of the liegemen. The phrase earth and water, even in modern Greek, symbolizes unconditional subordination to a conqueror.
Hippocrates encouraged his fellow healers to use salt water to heal various ailments by immersing their patients in sea water. The ancient Greeks continued this, and in 1753, English author and physician Richard Russell published The Uses of Sea Water in which he declared that salt was a "common defence against the corruption of…bodies" and ...
Some groundwater finds openings in the land surface and emerges as freshwater springs. In river valleys and floodplains, there is often continuous water exchange between surface water and ground water in the hyporheic zone. Over time, the water returns to the ocean, to continue the water cycle. The ocean plays a key role in the water cycle.