... inversion. Before the age of the automobile, most smog came from burning coal and was so severe that in 19th-century London, street lights were turned on by noon because soot and smog darkened the midday sky. Burning gasoline in motor vehicles is the main source ... instance, has been reformulated several times to achieve cleaner burning. Various manufacturing processes have been redesigned so that less waste is produced. Car manufacturers are experimenting with automobiles that run on electricity or on cleaner-burning fuels. Buildings are being designed to take advantage of sun ... of ...

• Word Count: 6167
• Approx Pages: 25
• Has Bibliography
• Grade Level: Undergraduate

... it is likely that the resource will become non-renewable or even non-existent. The major causes of environmental degradation include deforestation, pollution, desertification and natural causes. Deforestation Overview Forests cover approximately 31% of the Earth's surface and produce vital oxygen and provide shelter for animals. It provides us with many benefits, including producing goods such as timber ... the clearing of deep peatlands in the Sumatra (western Indonesia) has contributing to increased greenhouse gas emission in Indonesia, which leads to the decreased availability of food...

• Word Count: 1066
• Approx Pages: 4
• Grade Level: Undergraduate

... good exercise. Another form of reducing air pollution would be to shop or bank on the internet because this would eliminate the use of a car but the computer would still produce small quantities of pollution into the air. The pollution produced by the computer is on a much smaller scale ... than the pollution caused by the fumes of a car. On the other hand there are some solutions that I will not partake in because they are simply not realistic for me in my life. Some of ... include: 1) not use products that produce CFC's because they break apart covalent bonds in ozone therefore formin...

• Word Count: 1369
• Approx Pages: 5
• Grade Level: Undergraduate

... the energy of gasoline; this could result in a lower fuel consumption and better mileage. On the other hand, three main disadvantages of hydrogen as a car fuel are its low density, safety problems and, since the insulation is not perfect yet, also evaporating of hydrogen, that is typically about 1,7 percent ... heavy because of the metal included in the hydrogen tank. BMW and Mazda are demonstrating that it is anyway possible to run a hydrogen-powered car that is reliable and safe. BMW operates an experimental BMW 745hi ("hi- for hydrogen injection) vehicle that has a hybrid engine able ...

• Word Count: 2745
• Approx Pages: 11
• Has Bibliography
• Grade Level: Undergraduate

... . (Virulian's Encyclopaedia 1st edition, 1993, pp 48) For this task it is required that extensive investigation and research is done to find the effect of sodium chloride on plants. Theoretical Overview While houseplants are commonly grown for decorative purposes, they are so much more. Even though plants seem basic, they serve an important role in our ecosystem; they are "the ... ...

• Word Count: 1299
• Approx Pages: 5
• Has Bibliography
• Grade Level: Undergraduate

The Global Carbon Cycle USGCRP Program Element The Global Carbon Cycle Overview Recent Accomplishments Near-Term Plans New Postings Archived Postings Related Sites Calls for Proposals For long term plans, see Carbon Cycle chapter of the Strategic Plan for the Climate Change ... ...

• Word Count: 1012
• Approx Pages: 4
• Grade Level: Undergraduate

... worry that other chemical refrigerants may not have the same effectiveness as freon, which is the most popular "active ingredient- in car and home air conditioning systems (Makhijani, 79). However, EPA regulations adopted in 1999 and 2000 mandate checkups on car air conditioning systems and static a/c systems in commercial buildings to ensure that there is no freon or CFC leakage. Conclusion Ozone ... in the years since 1960. Numerous industrial and chemical processes were probably responsible for the increase in ozone-reactive CFCs and other chemicals since then, but the drastic increa...

• Word Count: 1616
• Approx Pages: 6
• Has Bibliography
• Grade Level: Undergraduate

... of energy." Therefore, even though hydrogen has 2.8 times the power of gasoline, it needs four times the volume to be stored. "Special insulated tanks in the BMW's [Concept Hydrogen powered car] held 140 litres of hydrogen, enough to drive at least 300 kilometers. (that's a reasonable range, although a 95 litre tank of petrol would take the ... car twice as far.)" (Lehane 3) This happens to work out well for aircraft in which weight is more of an issue than size, but automobiles need to be somewhat compact and ... deprivation of sulfur, will produce the hydrogen at a rate of about thr...

• Word Count: 1803
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

... is powered by the pressure made from the air and fuel mixture. In order to create this pressure, the engine only requires 10 milligrams of gasoline per one combustion stroke. A car uses a fuel mixture of 12:1 ratio of air and fuel under normal operations (Halderman Automotive 195). Sometimes the fuel/air mixture can be lean or rich. When the mixture is ... lean, the fuel ratio is considered lower than what is required. Rich mixtures have more fuel than the combustion process requires. With a rich fuel mixture, the car runs very smokily, or poorly. During any of these conditions, vehicle...

• Word Count: 1239
• Approx Pages: 5
• Has Bibliography
• Grade Level: Undergraduate

... of greenhouse gases emissions. Many cars have started to convert to use of more environmental-friendly fuel such as unleaded petrol, and this should continue to be popularized to more car owners. Other ways that individuals can help to save the environment includes consumption of environmental-friendly products (e.g. do not contain CFCs, do not endanger wild species), more efficient consumption of ... , import tariffs can deter the purchase of new cars. A good example would be in Singapore context, where the government implements the system of Certificate of Entitlement (paying money to ...

• Word Count: 2448
• Approx Pages: 10
• Grade Level: Undergraduate

... of Paris, and designing the new method for saltpeter. Saltpeter is potassium or sodium nitrate. He married the daughter of a tax farmer. She was a young, beautiful thirteen-year-old girl named Marie-Anne Pierrette Paulze. She prepared herself to be her husband's scientific collaborator by learning English to translate the work of British chemists like Joseph Priestley and by studying art ... the "air- responsible for combustion was also the source of acidity. He disproved phlogiston theory by demonstrating that oxygen is required for combustion, rusting, and respiration. The next year h...

• Word Count: 820
• Approx Pages: 3
• Grade Level: Undergraduate

... protection. Carbon monoxide comes from the exhaust of gasoline powered vehicles and secondarily from industrial processes (Hamer 45). "The most polluting activity an average person does everyday is driving their car"(EPA). Hemoglobin, which is a chemical in the blood, gets affected by carbon monoxide, in turn, carries less oxygen to body tissues causing health and heart effects. Some health problems come ... ...

• Word Count: 1128
• Approx Pages: 5
• Has Bibliography
• Grade Level: Undergraduate

... of controlled explosion produces various harmful emissions "most notably Hydrocarbons, Carbon monoxide, and Nitrogen Oxides. Hydrocarbons, which are toxic and carcinogenic, escape into the air during refueling and running a car engine and cause eye irritation, congestion, wheezing, shortness of breath, permanent lung damage, and acid rain. They also react with Nitrogen Oxides in sunlight to form ground level ozone. A colorless ... ...

• Word Count: 923
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

... physical and chemical properties of nanoparticles in applying solvents. Knowing that magnetic iron oxide nanoparticles holding a large amount of surface to volume ratio acquiring high surface energies, that's why they desire to be gathered to decrease the surface energy. What is more, the individual iron oxide nanoparticles mostly the magnetites exceedingly tend to be oxidized in the air, which is disadvantage ... ...

• Word Count: 574
• Approx Pages: 2
• Grade Level: Undergraduate

... number of ridges varies with size "while smaller forms had 20 ridges, larger ones could have as many as 550. Another notable find was the Spriggina floundersi, which was named after R.C. Sprigg and Ben Flounder; the two geologists credited to their discovery. These small annelid worms ranged between one and three inches in length and had small horseshoe shaped heads ... ...

• Word Count: 1197
• Approx Pages: 5
• Grade Level: Undergraduate