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Salinity in both the rivers and on the land is one of the main and most costly
results of overclearing and irrigation. Salinity is caused by changes in the
delicate balance between surface water and groundwater systems. A small increase
in the infiltration of water from the topsoil to the groundwater, due to
rainfall or irrigation, can result in a dramatic rise in groundwater pressure
and watertable levels.
The trees of the open forests are now replaced by shallow-rooted crops and
pastures which absorb far less water than the native trees. Those trees had been
massive water pumps, sucking up moisture from deep underground and putting it
back into the atmosphere through the evaporation from their leaves. With those
pumps gone, ...
Visiting Researcher, The Foresight Institute P.O. Box 61058, Palo Alto, CA 94306 USA hanson@charon.arc.nasa.gov 510-651-7483 To appear in Social Epistemology, 1992. (version appeared: in Proc. Eighth Intl. Conf. on Risk and Gambling, London, 7/90.) C O U L D G A M B L I N G S A V E S C I E N C E? Encouraging an...
may be created by substituting some or all of the hydrogen of a phosphoric acid by metals. Depending on the number of hydrogen atoms that are replaced, the resulting compound is described as a primary, secondary or tertiary phosphate. Primary and secondary contain hydrogen and are acid salts. Secondary and tertiary phosphates, with the exception o...
Las tres f'rmulas de Stephen Hawking para viajar en el tiempo Actualizado Martes , 11-05-10 a las 18 : 33 ''Es posible viajar en el tiempo? 'Podemos abrir un portal al pasado o encontrar un atajo al futuro?'. El genial f'sico brit'nico Stephen Hawking se hac'a estas preguntas en un art'culo publicado esta semana en el diario Daily Mail. El cosm'...
The chemical make-up of sodium chloride is NaCl. Sodium Chloride is composed of is composed of a negatively charged chloride ion (Cl) and a positively charged sodium ion (Na). So I believe that when sodium chloride is dissolved in water the two ions that compose the sodium chloride should separate, and support an electrical current that would be s...
LA Gear and other shoe companies have been using mercury to make the switch active in their shoe that light up when a person walks. The shoes should return to the company after the user is done with the to be recycled. Since LA never advertises this, people just thrown them away like any other pair of old shoes. Eventually the shoes end up in a...
The phenomenon of bipolar affective disorder has been a mystery since the 16th century.History has shown that this affliction can appear in almost anyone. Even the great painterVincent Van Gogh is believed to have had bipolar disorder. It is clear that in our society many people live with bipolar disorder; however, despite the abundance of people s...
Mars is the fourth planet from the sun at about 228 million-km (141 million miles) and the last terrestrial planet from the sun. The next five planets in order from the sun are gaseous. Mars follows closely behind Earth but is comparatively smaller, with about half the diameter of Earth and about one-tenth of Earth?s mass. Thus the force of gra...
Venus flytrap What does it eat? Flies and other flying insects supplement its nutrition from the soil on which it lives. Sometimes if there is a large it will eat a small frog or toad. The Venus flytrap lives on soils that are poor in nutrients, and in particular nitrogen compounds, such as nitrates, that the roots can absorb. The insect "diet"...
Cryogenics is a study that is of great importance to the human race and has been a major project for engineers for the last 100 years. Cryogenics, which is derived from the Greek word kryos meaning "Icy Cold," is the study of matter at low temperatures. However low is not even the right word for the temperatures involved in cryogenics, seeing as th...
If asked what light is, one could say that it's one of the most basic elements of our world and our universe as we perceive it. It is through sight that we receive 90% of our information. It is through the use of telescopes aiding the naked eye that we are aware of the heavenly bodies around us. It is through light that the energy from the sun is t...
In the United States in 1995 alone, 43,063 died from . It is the number two cancer killer and the number one cancer in females ages 15 to 54. On average if a woman gets this disease, their life expectancy drops nineteen and a half years. This cancer is within the top three cancers of all women above the age of 15, and comprises 6% of all health car...
Have you ever wondered what is? has been around for many years, but many people don't understand what is, who used , and it's connection with the zodiac. Many people don't know this, but the actual term comes from two words, which are 'astra' and 'logos'. (Weblinkers.com Enterprises, p.1) When people believe in , what they believe is that the...
METAPHYSICS What is metaphysics? Metaphysics can be described as those things, which relate to external nature, after physics. The term was first used by the followers of Aristotle as a name for that part of his writings, which came after, or followed, the part, which treated of physics. This was Aristotle's first philosophy. His main concern was t...
Abstract: Aluminum sulfate reacts with phosphates to create aluminum phosphate and a sulfate. The conversion of the phosphate to aluminum phosphate is very important because this allows the phosphate to be easily extracted. This manipulation is used today in industrial waste treatment sights. The removal of phosphates is very important for if p...
