Problem Solution free essay sample

Air pollution  is the introduction of  chemicals,  particulate matter, or  biological materials  that cause harm or discomfort to humans or other living organisms, or cause damage to the  natural environment  or  built environment, into the  atmosphere. The atmosphere is a complex dynamic natural gaseous system that is essential to support life on planet  Earth. Stratospheric  ozone depletion  due to air pollution has long been recognized as a threat to human health as well as to the Earths  ecosystems. A substance in the air that can cause harm to humans and the environment is known as an air pollutant. Pollutants can be in the form of solid particles, liquid droplets, or gases. In addition, they may be natural or man-made. [2] Pollutants can be classified as primary or secondary.  Usually, primary pollutants are directly emitted from a process, such as ash from a volcanic eruption, the  carbon monoxide  gas from a motor vehicle exhaust or sulfur dioxide released from factories. We will write a custom essay sample on Problem Solution or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Secondary pollutants are not emitted directly. Rather, they form in the air when primary pollutants react or interact. An important example of a secondary pollutant is  ground level ozone  Ã¢â‚¬â€ one of the many secondary pollutants that make up photochemical smog. Some pollutants may be both primary and secondary: that is, they are both emitted directly and formed from other primary pollutants. About 4 percent of deaths in the United States can be attributed to air pollution, according to the Environmental Science Engineering Program at the Harvard School of Public Health. [citation needed] MAJOR PRIMARY POLLUTANTS PRODUCED BY HUMAN ACTIVITY INCLUDE: * Sulfur oxides  (SOx) especially sulphur dioxide, a chemical compound with the formula SO2. SO2  is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulphur compounds, their combustion generates sulfur dioxide. Further oxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4, and thus acid rain. 2] This is one of the causes for concern over the environmental impact of the use of these fuels as power sources. * Nitrogen oxides  (NOx) especially  nitrogen dioxide  are emitted from high temperature combustion. Can be seen as the brown haze dome above or  plume  downwind of cities. Nitrogen dioxide is the chemical compound with the formula NO2 . It is one of the several nitrogen oxides. This reddish-brown toxic gas has a characteristic sharp, biting odor. NO2  is one of the most prominent air pollutants. * Carbon monoxide   is a colourless, odorless, non-irritating but very poisonous gas. It is a product by  incomplete combustion  of fuel such as natural gas, coal or wood. Vehicular exhaust is a major source of carbon monoxide. * Carbon dioxide  (CO2) a colourless, odorless, non-toxic  greenhouse gas  associated with  ocean acidification, emitted from sources such as combustion, cement production, and  respiration * Volatile organic compounds   VOCs are an important outdoor air pollutant. In this field they are often divided into the separate categories of methane (CH4) and non-methane (NMVOCs). Methane is an extremely efficient greenhouse gas which contributes to enhanced global warming. Other hydrocarbon VOCs are also significant greenhouse gases via their role in creating ozone and in prolonging the life of methane in the atmosphere, although the effect varies depending on local air quality. Within the NMVOCs, the aromatic compounds benzene, toluene and xylene are suspected carcinogens and may lead to leukemia through prolonged exposure. 1,3-butadiene is another dangerous compound which is often associated with industrial uses. * Particulate matter   Particulates, alternatively referred to as particulate matter (PM) or fine particles, are tiny particles of solid or liquid suspended in a gas. In contrast, aerosol refers to particles and the gas together. Sources of particulate matter can be man made or natural. Some particulates occur naturally, originating from volcanoes, dust storms, forest and grassland fires, living vegetation, and sea spray. Human activities, such as the burning of fossil fuels in vehicles, power plants and various industrial processes also generate significant amounts of aerosols. Averaged over the globe, anthropogenic aerosols—those made by human activities—currently account for about 10 percent of the total amount of aerosols in our atmosphere. Increased levels of fine particles in the air are linked to health hazards such as heart disease,[3]altered lung function and lung cancer. * Persistent free radicals  connected to airborne fine particles could cause cardiopulmonary disease. [4][5] * Toxic  metals, such as  lead,  cadmium  and  copper. * Chlorofluorocarbons  (CFCs) harmful to the  ozone layer  emitted from products currently banned from use. * Ammonia  (NH3) emitted from agricultural processes. Ammonia is a compound with the formula NH3. It is normally encountered as a gas with a characteristic pungent odor. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to foodstuffs and fertilizers. Ammonia, either directly or indirectly, is also a building block for the synthesis of many pharmaceuticals. Although in wide use, ammonia is both caustic and hazardous. * Odors  Ã¢â‚¬â€ such as from garbage, sewage, and industrial processes * Radioactive pollutants   produced by  nuclear explosions, war  explosives, and natural processes such as the  radioactive decay  of  radon. SECONDARY POLLUTANTS INCLUDE: Particulate matter formed from gaseous primary pollutants and compounds in photochemical smog. Smog is a kind of air pollution; the word smog is a portmanteau of smoke and fog. Classic smog results from large amounts of coal burning in an area caused by a mixture of smoke and sulfur dioxide. Modern smog does not usually come from coal but from vehicular and industrial emissions that are acted on in the atmosphere by  ultrav iolet  light from the sun to form secondary pollutants that also combine with the primary emissions to form photochemical smog. * Ground level ozone  (O3) formed from NOx  and VOCs. Ozone (O3) is a key constituent of the troposphere. It is also an important constituent of certain regions of the stratosphere commonly known as the Ozone layer. Photochemical and chemical reactions involving it drive many of the chemical processes that occur in the atmosphere by day and by night. At abnormally high concentrations brought about by human activities (largely the combustion of fossil fuel), it is a pollutant, and a constituent of smog. * Peroxyacetyl nitrate  (PAN) similarly formed from NOx  and VOCs. Minor air pollutants include: * A large number of minor  hazardous air pollutants. Some of these are regulated in USA under the  Clean Air Act  and in Europe under the Air Framework Directive. * A variety of  persistent organic pollutants, which can attach to particulate matter. Persistent organic pollutants (POPs) are organic compounds that are resistant to environmental degradation through chemical, biological, and photolytic processes. Because of this, they have been observed to persist in the environment, to be capable of long-range transport, bioaccumulate in human and animal tissue, biomagnify in food chains, and to have potential significant impacts on human health and the environment.

Macbeth Essays - Creative Works, Characters In Macbeth, Films

Macbeth Essays - Creative Works, Characters In Macbeth, Films In Shakespeare's tragedy, Macbeth, the characters and the roles they play are critical to its plot and theme, and therefore many of Shakespeare's characters are well developed and complex. Two of these characters are the protagonist, Macbeth, and his wife, Lady Macbeth. They play interesting roles in the tragedy, and over the course of the play, their relationship changes and their roles are essentially switched . At the beginning of the play, they treat each other as equals. They have great concern for each other, as illustrated when Macbeth races to tell Lady Macbeth the news about the witches and she immediately begins plotting how to gain for her husband his desire to be king. At this point, Lady Macbeth is the resolute, strong woman, while Macbeth is portrayed as her indecisive, cowardly husband. He does have ambition, but at this point, his conscience is stronger than that ambition. Lady Macbeth explains this char acteristic of her husband in Act I, Scene v, when she says, "Yet do I fear thy nature; it is too full o' th ' milk of human kindness to catch the nearest way." The next stage of change developing in the characters of Macbeth and Lady Macbeth is in Act II. This is the act in which Macbeth kills King Duncan. Macbeth's character change is apparent because it is obvious that he has given in to his ambition and has murdered the king. He is not entirely changed, though, because he is almost delirious after he has committed the crime. He exclaims, "Will all great Neptune's ocean wash this blood clean from my hand? No; this my hand will rather the multitudinous seas incarnadine, making the green one red." He believes that instead of the ocean cleaning his hands, his hands would turn the ocean red. Macbeth's role has changed somewhat but not entirely, since he has committed the crime but his conscience is still apparent afte r the murder. Lady Macbeth's role similarly changes somewhat in Act II. The reader sees a crack in her strong character when she tells Macbeth in Scene ii of Act II that she would have murdered Duncan herself if he had not resembled her father as he slept. Her boldness is still evident, though, when she calms Macbeth after the murder and believes "a little water clears us of this deed." Unlike the roles of Macbeth and Lady Macbeth, their relationship remains unchanged from Act I to II. Their relationship is still very close as seen through Duncan's murder - a product of teamwork. At the end of Act III, both the roles and the relationship of Macbeth and Lady Macbeth have reached the final stage of their change. Now that Duncan is dead and Macbeth is hopelessly headed toward a life of immorality, Lady Macbeth fades into the background. Macbeth takes it upon himself in Act III to plot Banquo's murder without consulting his wife because he wants to protect her from the corruption that he has involved himself with. His role is now completely changed and there is no turning back for him. As Macbeth goes off on his own course during this time, Lady Macbeth's guilt is overwhelming and, cut off from him, she descends into madness. Her guilt emerges in Act III, Scene ii when she says she would rather be dead, and it grows from then on until her death. Lady Macbeth's character change is also evident in Act III, Scene ii when she backs out of Macbeth's mysterious murder plan and tell s him, "You must leave this." The relationship between the couple is being torn apart by this time in Macbeth. They are headed in separate directions - Macbeth towards a life of evil and Lady Macbeth towards insanity and grief. As Shakespeare developed the characters of Macbeth and his wife, their changing roles ironically ended up resembling the other one's role. At the beginning of the tragedy, Macbeth was the hesitant character with a strong conscience, while Lady Macbeth was powerful and firm. However, by the time these two characters were completely changed, Macbeth ended up being decisive and greedy, as Lady Macbeth turned out to be weak since her guilty conscience drove her

Top 10 most stressful jobs of 2018

Top 10 most stressful jobs of 2018 All jobs have components that make them stressful- even the ones that don’t seem like very high-stakes occupations. Certain scenarios or times of the year come up and it’s a mad sprint requiring late nights and all hands on deck. Then there are the jobs that just don’t seem to ever let up. Here 10 of the most stressful jobs out there for 2018- based on deadline demands, public scrutiny, required travel, physical risk, physical demands, environmental conditions, hazards, and public interaction. See if any of them call out to you- maybe you crave a life of pressure! Or†¦ maybe a career in a cubicle sounds just lovely to you. It takes all kinds to make up the workforce!1. Enlisted military personnelWith an average salary of $30k, constantly putting your life at risk, all over the world, makes the military one of the most stressful careers out there.2. FirefighterYour job is starting to look pretty cushy, when you consider that for less than $50k a year, on aver age, some people have to run into burning buildings on the regular. And you thought that big project was really making you stressed!3. Airline pilotWith a median income of just about $105K per year, airline pilots are well compensated for the stress of ferrying hundreds upon hundreds of souls around the globe.4. Police officerMaking about $60K per year, just a bit more than a firefighter based on median income, police officers are also under a great deal of stress and risk their lives on a daily basis.5. Event coordinatorEvent coordinators may not risk their  lives or limbs, but they are still the people  left holding the bag when anything- major or minor- goes wrong. If the hors d’oeuvres come out five minutes late- or early- or if the band has the wrong cord to connect their amp, or if there is a typo in the invitations†¦ You name it, they  bear the brunt of the yelling. These aren’t life threatening stakes, but the stress is almost always at a high.6. PR execPublic relations executives are responsible for the reputations and the fame-level of their clients. They don’t just have to manage logistics, they have to manage perception and public opinion. And that takes a lot of nail biting. Especially when their clients do something that requires the putting out of fires (albeit, of course, not literal fires).7. Senior corporate execIf you’ve made it to the top of your company tree, it’s not all big bonuses and stock options. With every rung up the ladder comes a great deal more pressure. And with pressure comes†¦ you guessed it, stress.8. BroadcasterFor a surprisingly low annual median salary of less than $40k per year, a broadcaster is required to clearly and calmly read the news from a teleprompter often riddled with typos. She must be poised and in control at all times, as all of   the action unfolds live. You think public speaking is hard? Try doing it every day on television.9. Newspaper reporterYou wonâ €™t make a lot of money, and you’ll have to run headlong into potentially dangerous or volatile situations to get a story. And once you get it, you have to race to get it published first. On top of that, if you make one mistake you’ll have lost your reputation.10. Taxi driverThis gig is perhaps the least well-paid of the top 10, with a median pay of $24K per year. Taxi drivers have to deal with rude people, drunk people, and people in a rush- not to mention other lunatic drivers, rush hour traffic, accidents, and weather. Plus they’re stuck in a car. Imagine trying to find a parking space in NYC every time you had to pee! It’s also a field that is getting extra pressure from rideshare companies like Uber and Lyft, so being a taxi driver is more stressful than ever these days.

How to implement a new strategy Essay Example | Topics and Well Written Essays - 750 words

How to implement a new strategy - Essay Example In order to prove their point in their article, the authors present the analysis of two different companies, DuPont Engineering Polymers and the Royal Canadian Mounted Police. These companies â€Å"used the tools of balanced scorecard strategy management to guide the decentralized units in their search for local gain even as they identified ways for them to contribute to corporate wide objectives† (Kaplan and Norton). Quite a few things need to be taken into consideration when a company picks a management system. The authors feel that developing a management system with a balanced scorecard framework is the best way to start with a successful system. Three things should be considered when doing this; the customer perspective, the financial perspective, and the learning and growth perspective. Prioritizing is also important. Several companies have successfully benefited from this approach by picking three to five strategic themes in order to prioritize the different enterprises of the company. Collecting these strategic themes and ideas can help to give the company focus on what it needs to both work on and focus on when developing its strategy. Some important themes can focus around customers; for example, the need to lower cost for customers, the need to attract other customers that may be beneficial to the business, and ways to make relationships with customers even more important by cross-sell ing or providing them with other services that they may need. Executive teams will need to identify strategic initiatives that support each theme and make sure that the resources, mainly the money and the manpower, are there to support each initiative. Scorecard based systems can be very effective for companies. They can help to measure performance and link together goals within the company. These themes help the corporation focus on its goals and priorities. In order to demonstrate this, the article moves into giving

Chemistry Essay Example | Topics and Well Written Essays - 500 words

Chemistry - Essay Example Some toxins, such as mercury, persist in the environment and accumulate. Humans or animals often absorb them when they eat fish. Handling toxic waste carefully can prevent health dangers. Toxic waste incinerators, for example, often burn waste for energy, but this potentially releases toxic chemicals into the air. Household hazardous waste (HHW) is more than you think it is. What's been hiding in your garage or basement or under your kitchen sink can do serious damage to the environment. It can get into the water system. It can hurt plants, animals - and you. Recycling offers the next best solution to eliminating the use of toxic materials. Not only does recycling save companies money and time spent acquiring new materials, it also diverts waste away from disposal methods, such as burning, that could potentially leak toxins into the ground and air. Toxic waste, like used motor oil for example, often contains metallic debris that you can easily reclaim through filtration. Ultimately, humanity needs to curb its use of products with toxic chemicals to minimize their potential hazards. Go green... Save the Earth... Recycle waste; these kind of environmental slogans have been used for decades but one only pays heed to it when he/she comes to terms with or can relate to it. Earth is our home, our playground, our future.

Music As Therapy Essay -- Psychology Music

Music As Therapy There was never a question in my mind that music possesses a strong element to help people. It has always been a stress reliever in my life. There is research that supports the belief that music is an instrumental part or impact on a wider realm of physical and mental disorders or disabilities. Music is known to set the mood or atmosphere for all types of situations. There is extensive research completed on this subject. Just take a look around. When you look at a movie it is filled with just the right music at the right time to convey the way the writer/ director wants you to feel. Call any major corporation for customer service assistance and you will here hold music to make you feel less tense and patient. This usually has an adverse affect because we know what they’re trying to do. Music Therapy is the prescribed use of music and musical interventions to restore, maintain, and improve emotional, physical, physiological, and spiritual health and well-being. These are the key elements which define interventions as music therapy. Music Therapy is goal oriented and provides a system to work towards a specific therapeutic goal and objective. Goals identified can include communicative, academic, motor emotional and social skills. In the end the music development learned in the sessions hopefully have a relaxing, positive effect on the client’s physical, psychological and socio-economical functioning. Music Therapy became a profession in 1950 with the establishment of the National Association for Music Therapy and the American Association for Music Therapy Association. (AMTA) There were nonmusical goals set for the professional setting. â€Å"They included: improving communication skills, decreasing inappropriate ... ...day that music is powerful medicine. It has a great affect on tearing down the walls of silence and affliction of Alzheimer’s, depression, injuries, healing. And did you know that kids, who study the arts, do an average of forty points higher in math and science? Music education is superior to even computer instruction in enhancing early childhood mental capacity and special intelligence. Music therapists prove every single day that music is powerful medicine. (Richards Institute of Education and Research) Music is Magic. Works Cited American Music Therapy Association http://www.musictherapy.ort/faqs.html Holistic-Online http://www.holisticonline.com/stress/stress_music-therapy.htm Richards Institute of Education and Research http://www.educationthroughmusic.com/brainarticles.htm#Michael%20Green War child http://www.warchild.org/projects/cenre/methods.html

Plain View Doctrine Essay

Plain View Doctrine is in essence a weapon for the law enforcement officers to prove the legality of their search and seizure. (â€Å"Plain View Doctrine†) As a rule, law enforcement officers are bound by the 4th Amendment which requires that before they could conduct a search or arrest they must first secure a valid search warrant or arrest warrant. Any object seized in the absence of a search warrant will be inadmissible in evidence. One of the exceptions however to the search warrant requirement is the Plain View Doctrine. The plain view doctrine gives validity to any search and seizure made by law enforcement officers even in the absence of search warrant. Although this doctrine is widely recognized as an exception to the search warrant requirement under the 4th Amendment, in reality, the law enforcement officer who discovers an illegal contraband in plain view does not really conduct a search. Rather, the law enforcement officer merely seizes what was already in his plain view. In applying the plain view doctrine in this fact pattern, I give a qualified answer. There are two issues in this case whether the marijuana cigarettes which the police officer found near the stolen purse is admissible in evidence under the plain view doctrine and whether the powdery substance the police officer found in the baggies on a patio table is admissible in evidence under the plain view doctrine. In the first scenario, I argue that the marijuana cigarettes found on the ground together with the other contents of the stolen purse is admissible in evidence against its owner. The three requirements of the plain view doctrine are present in this case. Firstly, the police officer discovered the marijuana cigarettes using his sense of sight. Secondly, the officer had the right to be in the place where the item was seen. It must be stressed that the police officer who discovered the marijuana conducted a hot pursuit operation of a fleeing suspect. In the course of the chase, the suspect dropped the stolen purse spilling its contents. Thirdly, the marijuana cigarette was found outside the purse and its discovery was not a result of prying or examination of the police officer. Clearly, the marijuana cigarette is admissible against its owner. On the other hand, I argue that the powdery substance or the illegal drugs found in the baggies on top of the patio table is inadmissible in evidence for violation of the 4th Amendment. In this case, the first and third requirements of the plain view doctrine were complied with. The police officer discovered the illegal contraband using his sense of sight and that the discovery of the illegal drugs was not the result of prying or examination. The illegal drugs were merely inadvertently discovered by the police officer when he entered the yard of the owner. However, the second requirement was not complied with. In this case, the police officer had no right to be in the place where he saw the illegal drugs. It must be stressed that the plain view doctrine applies only when a lawful search is in progress or the officer was otherwise legally present at the place of the seizure. Following a long line of jurisprudence, among the possible reasons why a police officer may be considered to be legally present in a particular place is if a) he is serving a search warrant, b) he was in hot pursuit of a suspect; c) he made the entry through valid consent; d) he made a valid arrest with or without a warrant. The officer was not serving a search warrant since he had none. The officer was not also in hot pursuit of a suspect because when he entered the woman’s house the pursuit operation had ceased. At the time, the suspect was able to escape from him. There was no lawful consent coming from the owner when he entered the premises. At the time of the discovery, the police officer was not making a valid arrest with or without a warrant since there was no person to be arrested in the first place. Thus, I believe that this evidence is inadmissible in court. This is consistent with the ruling of the court in the case of Washington v. Chrisman (455 US 1), where the court ruled that the â€Å"The plain view doctrine, however, does not authorize an officer to enter a dwelling without a warrant to seize contraband merely because the contraband is visible from outside the dwelling†¦ the plain view doctrine applies only after a lawful search is in progress or the officer was otherwise legally present at the place of the seizure. The initial intrusion must be justified by a warrant, by an exception to the warrant requirement, or by other circumstances authorizing his presence. †(455 US 1)