Pollution and its Negative Effects Pollution is the degradation of natural environment by external substances introduced directly or indirectly. Human health‚ ecosystem quality and aquatic and terrestrial biodiversity may be affected and altered permanently by pollution. Pollution occurs when ecosystems can not get rid of substances introduced into the environment. The critical threshold of its ability to naturally eliminate substances is compromised and the balance of the ecosystem is broken.
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foam. B. Hand Tools 1. Flat head screwdriver- a screwdriver designed to turn slotted screws 2. Flashlight- A flashlight (torch in British English) is a hand-held portable electric-powered light source. Usually the light source is a small incandescent light
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Mr. President‚ As your advisor on energy policy‚ I believe it is important to inform you on the current status of global warming and of the energy crisis. I would also like to suggest changes in the current energy policy. Global warming can no longer be given a blind eye. Long-term observations in the last century or so reveal that the U.S. climate is changing rapidly. According to the National Assessment Synthesis Team’s U.S. Global Change Research Program in 2000‚ the average national temperature
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Thomas Edison: Inventor or Patent Thief? Most inventions are created from a multitude of ideas and a number of men‚ and one man simply cannot be credited for the inventions such as the phonograph‚ the kinetoscope‚ or the light bulb. Unfortunately‚ it is usually the corrupt businessman who exploits such creations and claims them as his own who receives the lion’s share. Thomas Alva Edison was an ideal example of such a person. Edison hardly played any role in the actual production of anything revolutionary
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Conservation of Natural Resources Introduction: Humans have always made use of other species. Most wild species are found in areas where people live. This is either because people want to gather natural resources from there or they put their life to risk for purpose. Over the last 10‚ 000 years our food has come increasingly from cultivated plants and animals. This has resulted in the rapid increase in human population. The wise and smart use of the earth’s resources by humanity is termed as
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inventions which are the camera‚ the light bulb and the locomotive have greatly changed society. Without the light bulb‚ you couldn’t see at night‚ you wouldn’t be able to take pictures of anything for memories if the camera wasn’t invented and without the train there would be one less easier way to travel. Without the light bulb‚ you couldn’t see at night. Thomas Edison invented the light bulb mainly to make it for home use. The light bulb was made to create light that would last for a long time
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played a key role in inventing the light bulb. Lewis Latimer born in Chelsea‚ Massachusetts on September 4‚ 1848. He died in Flushing‚ Queens‚ New York‚ on December 11‚ 1928. Latimer was born to slave parents‚ George and Rebecca Latimer. In 1864 at the age of sixteen Latimer enlisted in the Union Navy‚ received an honorable discharge and went back to Boston. 1873 was the year Lewis Latimer got married to Mary Wilson in November. Mary
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Scope and Limitation This research focuses on the advantages of using an improvised light amplifier or “solar bulb” using three (3) basic household materials: Water‚ Plastic Bottle (preferable a 1.5L bottle)‚ and BLEACH. The researchers aims to determine the application‚ advantages and disadvantages‚ and some other important factors such as the duration of usage‚ cost‚ manner of maintenance‚ and the suitable environment for application. In addition‚ the study also involves minimal field work
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radiation (e.g. Light). In this lab‚ we will separate some light sources in to constituent colors and find out the wavelength of some atomic emissions. We will also try to compare the line spectra found from gas discharge tubes and flame emissions. Finally‚ we will measure the absorbance of Copper sulfate solution as a function of wavelength. Experimental Method: We start our experiment by looking through a Spectroscope at the outside sunlight‚ a regular light bulb (incandescent) and a fluorescent
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this is too much or too short. Light is the main source of plants for food production‚ and also for the growth of a plant. It is needed by a plant in order to survive. Natural light is the best light needed by plants‚ they say‚ but this light may not last long every day. In using artificial light‚ there would be no rainy‚ windy and cloudy location for a plant. Plants are also for home decors‚ but the location of the plant indoors might not have enough natural light a plant has to. So the researchers
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