Renewable Energy Sources - Free Essay Example

Sample details Pages: 3 Words: 992 Downloads: 8 Grade: Mark default Date added: 2017/11/10 Category Ecology Essay Level High school Tags: Renewable Energy Essay Did you like this example? The 20th century was without doubt the age of fossil fuels—oil, in particular. Fossils had been excavated almost throughout the entire history of humanity, but it is the 20th century which brought the scales of the excavation to the limit. Gasoline for vehicles, aircraft, and vessels, fuel for space flights and war machines, heating systems—all this and much more works on fossil fuel, even in 2017. Don’t waste time! Our writers will create an original "Renewable Energy Sources" essay for you Create order However, since the first studies proving that the utilization of fossil fuels makes a huge part of the global warming process, there have been talks about not only regulating its usage, but also about seeking for alternatives to oil, gas, and other sources of energy popular nowadays. Such alternatives are usually called with a generalized term â€Å"renewable sources of energy,† meaning that unlike fossil fuels (which are gradually depleting, and are expected to become exhausted completely by the end of the current century) these new sources will constantly replenish themselves. So, what exactly are renewable sources of energy? There are two terms in regard to the subject which are regularly used nowadays: alternative energy, and renewable energy. The former is a more generalized term, used to describe any energy source that is different from traditional fossil fuels, and which cause little-to-no negative impact on the environment. In its turn, the term â€Å"renewable energy† refers to energy generated with the help of the forces of nature: sun, water, wind, biomass, the inner heat of the Earth (geothermal energy), and so on (PennState Extension). Renewable energy is based not on depletable material, but rather on natural processes that cannot readily disappear if made use of. For example, solar energy is something everyone around the globe has access to; the Sun shines for billion of years with almost the same stability, and it is unlikely that generating energy from its heat and light can do any harm to the star itself. The same goes for windmills, watermills, and so on: instead of working on matt er, alternative sources of energy make use of how the wind blows, or how the water flows, and thus cause much less harm to the environment, and do not exhaust natural resources. Currently, there are several sources from which scientists have learned to accumulate energy: solar energy, hydropower, wind energy, geothermal energy, and bioenergy. Solar energy is created by the light and temperature produced by the Sun. Respectively, there are two types of solar energy: photovoltaic and thermal. The former implies producing electricity from sunlight, using photovoltaic elements, or cells. These cells are combined in large groups, known as solar panels, and put on rooftops, or other surfaces which are constantly being exposed to sunlight. Another way of capturing sunlight in order to produce energy involves using heliostats—huge mirrors which reflect and concentrate sunlight, converting it into thermal energy. Heat energy can be later converted into electricity as well (due to steam generation, which then drives steam machines), or can be used in industries that currently utilize gas and other fossils in order to produce heat. The energy outcome from every solar power station is huge, but there are other alternative sources of energy as well. For example, hydropower: free-falling water drives special turbines, which rotate and generate electricity; wind energy is gained in an approximately similar way, except that electric turbines are driven by wind, not water. A more advanced source is ocean energy: by exploiting temperature differences between ocean surfaces and depths, it is possible to produce a vast amount of energy. Tides and waves can serve as secure energy sources as well. Geothermal energy is gained by utilizing the heat of the Earth’s core; finally, bioenergy is gained from processing organic matter: agricultural and forestry products, biological waste, compost, garbage, and other similar substances can be converted into thermal and electric energy (Australian Renewable Energy Agency). Renewable energy is effective in many ways: economically, ecologically, politically, and so on. It is no surprise that many countries around the world have started attempting to substitute or diversify their energy with the help of alternative energy sources. For example, their share in the overall energy consumption in the United States in 2016 already was around 10%. 15% of the electricity generated was from alternative sources of energy. Industries in the United States actively use biofuels and other non-hydroelectric energy sources: their consumption has doubled since 2000 to 2016, and according to estimates of the United States Energy Information Administration, the amount of projects relying on alternative energy sources will only continue to grow (EIA). Other nations actively research and implement renewable energy as well. For example, Sweden is expected to become the first country in the world to completely give up on fossil fuels; the Swedish government has announced this g oal in 2015, causing huge investments into the country’s research and industries connected to renewable energy. Costa Rica was the first country to have reached 99% of its annual energy production solely due to alternative energy sources in 2015. Also in 2015, Denmark became the first country to produce 42% of its electricity with the help of solar turbines. The list of countries heavily developing alternative energy sources includes Morocco, Nicaragua, China, Germany, Scotland, and many others (CleanTechnica). Alternative energy sources have high chances to become the future of humankind’s energy solutions; fossil fuels were necessary at a certain stage of technological and scientific progress, but nowadays, it has become obvious that their extensive usage is not only expensive, but also dangerous for the environment and the health of billions of people around the world. Countries such as Sweden, the United States, Denmark, and several others actively research and implement renewable energy technologies, helping them to produce more electricity and thermal energy due to such sources as the Sun, rivers and waterfalls, ocean tides and waves, biomass, and the heat of the Earth itself. Renewable energy is cleaner, cheaper, and able to completely substitute fossil fuels. When this happens, the whole planet will become a better place to live.

Film Review A Beautiful Mind And Shutter Island - 996 Words

When it comes to Hollywood, knowing the difference between reality and sensationalized filmmaking for the sake of profit is important. Hollywood tends to exaggerate and manipulate the truth. The portrayal of Clinical disorders in film are examples of how Hollywood can alter reality. In both A Beautiful Mind and Shutter Island, the psychological disorder depicted is paranoid schizophrenia, but one does a better job of depicting the disorder accurately than the other. In A Beautiful Mind (Howard, 2001), the main character is John Nash, a brilliant mathematician from Princeton University. Nash’s symptoms first appear when he begins attending Princeton. He believes that he has a roommate named Charles Herman, but Herman is a hallucination caused by Nash’s schizophrenia. Later in the movie, Nash meets with Parcher, a U.S. Department of Defense agent, and believes that Parcher asks him to be a decoder for the government. Nevertheless, Parcher is also a hallucination inflicted by his disorder. Similarly, in Shutter Island (Scorsese, 2010), Edward Daniels has hallucinations of his dead wife and children. Daniels also has nonsensical delusions and believes that the hospital on Shutter Island is experimenting on innocent humans. These scenes show the manifestation of the symptoms of paranoid schizophrenia. Nash’s symptoms in A Beautiful Mind (Howard, 2001) are not limited to his hallucinations of Herman and Parcher. He appears to have disorganized thoughts as well, and has a breakdown

Two Unlikely Women in British Literature Free Essays

Two Unlikely Women in British Literature Rachael Haines British Literature Summer Term Critical Essay Allison, the Wife of Bath in Chaucer’s Canterbury Tales and Lady Macbeth from Shakespeare’s Macbeth, are two bold women in literature who abandon the expectations of society on women of the time and instead use manipulation to gain power and control. These two women, Allison and Lady Macbeth are significant female characters because they represent upheaval in their respective societies both in their behavior and in their expected societal roles. Allison, a cloth-maker, lives in a time following the Norman Invasion. We will write a custom essay sample on Two Unlikely Women in British Literature or any similar topic only for you Order Now The Anglo-Saxon ways including the more even playing field between sexes gave way to â€Å"frenchified†, male-dominant way of life. Women were expected to serve their husbands yet Allison expects her men to serve her. Lady Macbeth also acts unexpectedly when she takes things into her own hands and doesn’t act as a submissive and noble woman should. Following the delivery of the three witches’ message to Macbeth regarding his fate, Lady Macbeth instantly realized what is being threatened and desperately wants to change his fate. Instead of acting honorably and as a servant to her husband, she devises a plan in which she will commit regicide and kill Duncan herself. She instead decides to convince Macbeth to commit the murder himself. At first glance, the Wife of Bath may seem to be in support of feminism yet Chaucer describes her in explicit ways when he writes about her headdress, her scarlet dress, her hips and particularly her gapped teeth which were commonly associated with lust during her time. Allison comes off as experienced and knowledgeable about men because she has had five husbands. Unlike the women of her time, Allison is dominant. She uses her body and sexuality to manipulate and gain control over her men. During her fifth marriage even a traumatic blow to the head at the hands of her husband doesn’t stop her controlling behavior and she lies on the floor as if she is dead. She dramatically pretends to be dead from the blow in order to incite concern with her husband. Lady Macbeth quickly jumps into the thick of things when she learns about her husband’s predicted fate. She and her husband both want the wealth and power. Lady Macbeth devises a plan to murder the king so that fulfillment of the witches’ message might not be met. Lady Macbeth is desperate. She feels her husband is too loyal and not ruthless enough; too weak. Lady Macbeth, although bold and ambitious recognizes that she isn’t really capable in her current state of carrying out murder. Instead she asks for the supernatural ability to be unsexed; to rid herself of feminine qualities so that she can murder the king. Instead of gaining supernatural power, Lady Macbeth convinces her husband to commit the murder†¦freeing her from the burden of actually committing the crime. Lady Macbeth becomes merely the catalyst for her husband’s out of control murderous behavior. Both women use manipulation to get what they want and both women live outside the societal norms of their time. However, Allison ultimately is a much more durable character. Allison presents herself as a promoter of sexual freedom and not a promoter of feminism. She uses her sexual skill and her body to gain what she purports that women want most; sovereignty over their husbands at a time when servitude by the woman was expected. For Allison, her sexuality was her biggest shock factor. At first meet, Lady Macbeth paints an image of herself as a villainous queen; both strong and ambitious to retain her power. Yet it isn’t long before we realize that Lady Macbeth cannot handle the guilt associated with being a murder and committing regicide even though her hands didn’t actually commit the murder, she pushed and supported her husband in completing the acts. Before long, the power hungry spree begins to take its toll on the ambitious Lady Macbeth. The audience witnesses her deteriorating health and mental stability as she fruitlessly tries to wash her hands of the guilt. In this comparison, I find that while both women were women outside of the norms of society they did convey an upheaval. They may have represented the frustration that women and men might have felt over the ever-changing society that both writers endured. However, regarding our leading ladies, Allison is a much stronger character who is able to endure the ill effects of her manipulation, while Lady Macbeth falls victim to them in her quick demise. Neither of these bold, unforgettable ladies were typical ladies of their time. How to cite Two Unlikely Women in British Literature, Papers

What Do You Do for Good Health free essay sample

Health is Wealth is very much true. One must try hard to remain healthy we are healthy ,we can easily fight with other problems of life. people do many different things to remain healthy . some go for healthy diet, other recommended exercise, and rest thinks health awareness is important ,after all Prevention is better than cure. A healthy diet is very necessary to remain healthy. People must take care of their diet. Everybody should read the ingredients before buying any eatables as well as how any vitamins it contains Americans are facing a very big problem of obesity. This is due to their unhealthy diet ,mostly people used to eat in fast food restaurants. Obesity leads to many health problems like heart attack, blood pressure, Cholesterol problem. Fat people can work less and with less efficiency. Balance diet which contains fruits, green vegetable Juices fibre are healthier choices for your regular die . We will write a custom essay sample on What Do You Do for Good Health or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page roper diet plan is always helpful for better health like less oily and sugary ood . Sticking to healthy diet keep you in great shape and in a healthy life style. Exercise is helpful to maintain our healthy lifestyle. Few minutes of exercise can make lot difference. While exercising, your body releases chemicals called endorphins that can improve your mood and the way you feel about yourself . Another source of exercise is yoga. Yoga not only gives physical exercise but also mental relaxation. Meditation is another source of exercise and realising stress this helps you in North- western University say sleep problems affect millions of adults, who could likely improve their quality of sleep, vitality, and mood with regular aerobic exercise. Health awareness is factor that people are living longer. Regular medical checkup, clean and tidy life style ,nutritious food are few examples. Everybody should read the ingredients before buying any eatables as well as how many vitamins it contains. People