Posts Tagged ‘Pollution’

Light Pollution

July 10th, 2010

Product Description

Light-pollution is the modern scourge of optical astronomy. More and more observing sites are being lost as the glare of city lighting blots out the night sky. Professional astronomical observatories are located far from cities, but amateur astronomers often do not have this luxury. This book considers the two available strategies open to astronomers – get rid of the light pollution by lobbying authorities and standards organisations, and minimize its effects by using the correct instrumentation. The book contains an extensive detailed catalogue of deep-sky and other objects that – despite what one might believe – can be seen from variously light-polluted sites, for practical observers.

Light Pollution: Responses and Remedies (Patrick Moore’s Practical Astronomy Series)

Main Causes of Water Pollution

November 24th, 2009

Man is the main cause of water pollution.

People pollute the water with chemicals and other hazardous materials. People have no regard to water – their source of life. There are many sources of water pollution but it is not the source that is really causing the problem but the improper disposal of the pollutants.

Aside from improper and careless waste disposal, another main cause of water pollution is toxic substances coming from industrial, agricultural and domestic use. Trace elements of lead, cadmium, mercury, dioxins are detected in different water sources which sometimes accumulate in the water supply causing health problems. These toxic substances come from industries such mining, power plants, automobile manufacturers and others that produce toxic substances leading to bodies of water. Apart from these industries, these toxic materials contaminate the water through accidents like chemical or oil spills. » Read more: Main Causes of Water Pollution

Athletic and Sports Field Lighting

September 27th, 2009
Athletic and Sports Field Lighting

RLL Design athletic and sports field lighting can be used to light any type of arena, stadium, playing field, or sports center. Similar to floodlights, they can be mounted on metal or wooden poles to provide evenly distributed, glare free lighting of game areas, spectator stands, concession areas, and areas leading from the parking lot to the stands. RLL Design athletic and sports field lights feature multi-tap ballast control in voltages of 1 » Read more: Athletic and Sports Field Lighting