Electric Cars Essays (781 words) - Liquid Fuels, Petroleum Products

electric cars narangerel Privately Owned Gasoline Powered Vehicles Should Be Limited The automobile has become a very important part of todays society. It is a necessity to own or to have access to a car in order to keep up with all of the competition of the business world, and also ones social demands. Most people would not be able to travel around a country or the world without this incredible machine, for it provides freedom and mobility, even for people who do not own a car. Unfortunately, the car has a very destructive nature. Automobiles make a major contribution to air and noise pollution, the depletion of fossil fuels, and the abnormalities in children and adults due to lead poisoning. Although our economy currently defends on gasoline- powered cars, it is my belief that the use of gas-powered automobiles must be limited because of air pollution, natural resources and lead poisoning. First of all, and most importantly, automobiles are harmful to our environment. By definition, automobiles run on gasoline, which is a mixture derived from petroleum. Gasoline contains hundreds of different hydrocarbons, or compounds containing the chemical elements carbon and hydrogen (Gasoline). When the gas is burned in the engine of the car, several byproducts result. These exhausts include hydrocarbons and oxides of three elements: Carbon, nitrogen, and sulfur (Emissions). Tiny amounts of poisonous trace elements such as lead, cadmium, and nickel also are present. Everything contained in the exhaust affects the environment intensely. Auto engine exhaust contributes about fifty percent of todays atmospheric pollution, and in highly populated and industrialized cities, air pollution consists of up to 80% car exhaust. Because of all of the gasoline-powered cars on the road, the earths outermost protective shell, the ozone layer, is being destroyed. The ozone layer guards against, a mong other things, global warming and skin cancer. If it is annihilated, the whole planet, including the human race, will be erased along with it. This is one reason gasoline powered automobiles should be limited. Another reason privately owned gasoline powered vehicles should be limited is the depletion of the fossil fuel supply. People all over the world need petroleum, a fossil fuel, to fill their cars in order to get around. However, petroleum, like many other natural resources on this earth, is in short supply. The continued use of petroleum at the current rate will cause the limited supply to dwindle. Our society does not seem to realize this point, though. As a result; petroleum is wasted in many ways while en route to an automobiles gas tank. In order to stop these things from occurring, we, the entire population as a whole, must consolidate our opinions and come up with alternatives to these harmful activities. One such alternative is the electrically powered automobile, which runs on a battery much the same as the one underneath the hood of the car now. A third reason privately owned gasoline powered vehicles should be limited is because they are contributing to an enormous source of lead in the air, which is dangerous to the body. When gasoline is burned in the engine of an automobile, it can release many things, dependent upon what type of gasoline it is. There are two main types of gasoline: leaded and unleaded. The leaded contains lead, while the unleaded does not contain as much. Fortunately, most cars today require gasoline of the unleaded type. However, some old cars still in use need leaded fuel. This poses a threat to every person in the world, for every one of us could die of lead poisoning. Lead was first added to gasoline in the 1920s to improve car mileage and prevent engine knock, or an explosion that occurs when the gas is compressed in the engine. Lead levels in human blood rose with the proliferation of cars and trucks on the highway. It has since been proved that auto emissions are the single largest source of lead in our environment, and that high levels of lead in young children can cause brain damage, mental retardation, kidney disorders, and interfere with the processing of Vitamin D. Because of the preponderance of unleaded fuel on the market, the amount of lead in the air has decreased. But does

The Worlds First Farmers essays

The World's First Farmers essays One day about 9,000 B.C- thats about 11,000 years ago - a little boy was walking. He picked up some grains of wheat, which were growing wild. As usual, when he got back to camp where he lived, he gave the grains to his mother. She ground then into flour between two flat stones. But no one noticed that a few of the grains fell on to earth. Weeks later, when the family was wandering in search of food, they passed by their old camp. There, as if by magic, was a little clump of green shoots. More wheat! The fallen grains has sprouted and begun to grow. Soon there would be new grains of wheat to pick. The family had made a great discovery-instead of having to search for wild food, they could grow it themselves in one place. And so they settled down. They gathered more wild grains and them in the ground. They built huts with sticks covered in mud. They even built storehouses to keep their spare food in. as time went by; they learned how to keep goats and sheep in herds nearby. Now they could have meat and milk whenever they like or feel like having some. This was probably the way farming began. It was one of the most important changes in human history. People no longer needed to wander about in search of food. They could stay in one place and farmland. And with time to invent new skills such as pottery and weaving. How did farming change peoples' lives? Before farming people lived by hunting wild animals and gathering wild plants. When supplies ran out, these hunter-gatherers moved on. Farming meant that people did not need to travel to find food. Instead, they began to live in settled communities, and grew crops and raised animals on nearby land. They built stronger, more permanent homes and surrounded their settlements with walls to protect themselves. How did people become better farmers? By around 9000 B.C, people were storing grains during the winter, then sowing them in specially cleared plots. By 800B.C, the farmers ...