Air Pollution in Mexico City Essays

Air Pollution in Mexico City Essays Air Pollution in Mexico City Paper Air Pollution in Mexico City Paper 2005). More than 20% of Mexico entire population lives in its capital and more than 0 % of the countrys industrial output is produced here (Edgerton et al. N. Although Mexico City is considered one of the worlds largest cities, it is still growing at a rate exceeding 3% annually. Moreover, the number of vehicles daily traveling on its streets makes up more than three million (Edgerton, et al. , n. D). All the factors listed above contribute to Mexico Citys poor air quality. Mexico City is a perfect example of one of the burgeoning cities that experience severe air pollution. The ozone concentration in Mexico City is one of the highest in the world, being more than four times higher than the accepted norms. Particulate matter, sulfur dioxide, carbon monoxide and some other harmful gases also exceed the Mexican health advisory level (Walsh, 1999). Nevertheless, comprehensive air quality management programs since 1 990 have contributed to major reductions in the concentrations Of some pollutants such as lead, carbon monoxide and sulfur dioxide (Nominal Nominal, n. D. ). Sulfur in diesel fuel has been reduced from 0. 5% to 0. 05%. Many old buses and trucks of Mexico City were replaced by newer ones powered by more modern and cleaner engines. In addition, unleaded fuel was introduced at that time to make the vehicle emissions elatedly cleaner (Edgerton et al, n. Although the above measures contributed to a slight positive change in Mexico Citys air quality, serious air pollution problems still persist. The poor quality of air is the result of several factors: emissions from the combustion of fossil fuels in motor vehicles and for industrial processes, energy production, high dust levels due to local constructions, population groom (Nominal Nominal, n. Those human demands on the ecosystem are changing the landscape with important atmospheric consequences as well as causing threat to human health. People suffer from various diseases starting from insignificant ones like headaches, nausea, and allergic reactions to more serious ones like chronic respiratory disease, lung cancer, heart disease, and even damage to the brain, nerves, liver, or kidneys (How can air pollution hurt my health? , n. Although it is not possible to determine the total impact of Mexico Cues poor air quality on public health, McKinley et al. 2005) calculated that only a 10% reduction Of particulate matter in the air would save 3,000 lives and 10,000 new cases of chronic bronchitis each year, and that reduction of ozone loud save 300 lives. As approximately 80% of particulate matter and nitrogen oxide, 45% of volatile organic compounds, and 30% of sulfur dioxide come from mobile sources, their emissions level should be reduced (McKinley et al. , 2005). One of the possible solutions to reduce air pollution from vehicles is to continue enforcing legal regulations concerning air pollution prevention. As mentioned above, Mexico Citys government has taken several measures and attempted various programs in order to decrease the level of air pollution in the city. The first plan Program Integral era el Control De Ia Contamination n Tomatoes Rica (PICA) was started in 1990 and had major attainments, including the introduction of two-way catalytic converters, the phase-out of leaded gasoline, and the establishment of vehicle emissions standards (McKinley et al. , 2005). The second program, PREPARE 1995-2000 (Program Para Major la cyclical del Eire en el valley De Me OIC Program to Improve Air Quality in the Valley of Mexico) had other major accomplishments, such as the introduction of methyl tertiary butyl ether (METE) in gasoline to improve combustion efficiency, and carried out extractions on the aromatic content of fuels and on the sulfur content in industrial fuel (McKinley et al. , 2005). These programs have had significant impact on reduction of air pollution in the city. That is why more of these kinds of programs should be implemented in Mexico City, so the city can finally reduce the levels of air pollution to acceptable norms. For instance, the government should implement policies concerning taxis. According to Connelly (1999), taxis and individual cars that replaced traditional buses are the most polluting of all forms of transport. Approximately 110,000 taxis circulate the streets of Mexico City (McKinley et al. , 2005, p. 1955). Because of the large number of kilometers traveled each day by taxis, their emissions are quite high. Even though taxis account for only 3. % of Mexico Citys vehicle fleet, the their emissions make 3. 6% of particulate matter, 11 of sulfur dioxide, 10. 7% of carbon monoxide, 10. 2% of nitrogen oxide and 14% of volatile organic compounds of all transportation related emissions (McKinley et al. , 2005). Thus, all the taxis around the city have to be diminished. Instead of taxis, the government should provide the residents tit more buses and minibuses. The advantage of this policy is obvious: if there would be no taxis traveling in the city, less harmful gases would be emitted. Moreover, the analysis made by McKinley et al. 2005) suggests that a turnover of the taxi fleet due to its size and age would benefit from over $70 million US in reduced health impacts from air pollution, and would also benefit from fuel savings, whose costs summed up together, is greater than this measures investment cost. However, there are several drawbacks to this solution. Firstly, taxis are very convenient for people who do not have their win car to travel around more efficiently or to travel to places, which locations are not known to you. For instance, taxis are very beneficial for the tourists who do not know the city. Moreover, most people earn money by working as a taxi driver and total ban of taxis would deprive them of their way of earning money. Therefore, most people might disagree with this policy and solution generally. Another possible solution is to pass the law on telecommuting. Telecommuting or telethon basically means working from a place rather than traditional office environment, usually from home. The stance traveled by a person is a significant factor in air pollution because less distance traveled, less undesirable gases are emitted. As telecommuters work from home, they tend to travel less often. The research indicates that on the telecommuting days, the distance traveled by vehicles is decreased by 76%. Consequently, there are fewer gas emissions: to be more precise, there is a reduction by 64% of total organic gases, 63% of carbon monoxide and 73% of oxides of nitrogen (Sympathy, Saxons Nomination, 1991). Other advantages of telecommuting are that it can be implemented now, as it does to require any expanded planning, design and construction; it is relatively inexpensive to implement; it expands personal choices rather than restricting them, by offering them more flexibility in work and lifestyle (Sympathy et al. 1991). However, some employers and employees would disagree with this solution because there are some disadvantages. Firstly, telecommuting may incite legal issues between organization and employers. Some of the issues they may face are workplace safety and compensation issues (Mills, Wong-Ellison, Werner Clay, 2001 The organization cannot guarantee employees saf ety because employee works out of the office. And if any accident happened to the employee, the organization would not want to compensate employees medical expenses because the employee cannot prove that the accident coco red in the scope of employment. Secondly, lack of interaction with co-workers and isolation from society due to telecommuting, can have negative affects on individuals behavior and attitudes as well as can lead to negative consequences, like anxiety, depression, and even physical ailments (Gained, Kelley Hill, 1999). Moreover, not all jobs are suitable for telecommuting and some employers slide supervising employees they cannot see (Mills, et al. , 2001 Nevertheless, telecommuting should be considered as one of the possible solution, because it is a perfect way to reduce vehicle traveling during the day, consequently reducing air pollution levels. The last, but not the least possible solution is to replace gasoline usage in the city with hydrogen fuel. The transportation sector is currently consuming gasoline and diesel at high rates. More than half of the globally used oil is used for transportation (Kurtosis Kari, 2006). The harmful emissions to the environment are uh to its usage. Therefore, alternative fuels should be used more. Some types of alternative fuels are biological (methanol, ethanol), bodiless and hydrogen. Kurtosis and Kari (2006) compared the fuels listed above and came to conclusion that the use of hydrogen as a fuel would be the most beneficial one. A transition from fossil fuels to hydrogen would decrease the air pollution level because almost zero emissions occur, with water being the only by-product. In addition, hydrogen is the most abundant element on the Earth, so there should not be concerns about running out of its stocks. Moreover, car industries should produce more automobiles with a hydrogen- powered internal combustion engine. Currently, BMW is the only one. BMW also made the automobile to be powered either by hydrogen or gasoline, as the availability of hydrogen refueling stations is low (Kurtosis Kari, 2006). However, there are several disadvantages to this solution. Firstly, hydrogen made from electrolysis of water is very expensive. At 25 C, 65 watt- hours are needed to electrolyte one mole of water, which is 4. KHz of electricity to generate one cubic meter of hydrogen. This electricity comes room the alternator which of course is powered by the engine, which uses energy (Kurtosis Kari, 2006). So, fuel economy is decreased by the same means you are trying to improve fuel economy. But there is an alternative way to produce hydrogen, which is to split the water molecules through the use of wind or solar energy, what is less expensive (Kurtosis Kari, 2006). Another disadvantage is that the number of hydrogen refueling stations is very low. So, if individual runs out of the gas, it will be difficult to find a station to refuel the automobile immediately. To construct ewe hydrogen gas stations will require the government to allocate huge amounts of money. Winter (2006) estimated a hydrogen station construction to cost from $500,000 to over $5 million, depending on station size (30 keg/day 1 ,OHO keg/day). This amount includes the capital costs, installation costs, feedstock costs and fixed operating costs. Despite the disadvantages, producing and using hydrogen instead of gasoline holds the promise of pollution reduction in Mexico City. Mexico City is often said to be the most polluted city in the world. It certainly does pose serious environmental threats o its survival as a city, but it affects regional and global air quality levels as well. Therefore, specific measures have to be taken in order to reduce the air pollution level. There are some basic solutions that could be used, like continue enforcing legal regulations, pass a low on telecommuting and use hydrogen fuel instead of gasoline. All of these have already been implemented and we know that they will work for the environment. Therefore, the government should enforce these solutions and stop the air pollution in Mexico City.

How to Use the French Expression Allons-y

How to Use the French Expression Allons-y The French phrase allons-y  (pronounced ah-lo(n)-zee) is one you may find yourself using if youre traveling with friends or about to begin something. Literally translated, it means Let us go there, but this idiomatic expression is usually understood to mean  Lets go. There are many variations of this common phrase, depending on the context, such as lets get going,  off we go, lets get started, here we go, and more. French speakers use it to  announce that its time to leave or to indicate the beginning of some activity.   Usage and Examples   The French expression  allons-y is essentially the first person plural (nous) form of the imperative of aller (to go), followed by the adverbial pronoun  y. Rough synonyms include  On y va!  (Lets go) and  Cest parti  (Here we go). An informal variation is Allons-y, Alonso.  The name Alonso doesnt refer to an actual person; its just tacked on for fun because its alliterative (the first two syllables are the same as those of  Allons-y). So its a bit like saying, Lets go, Daddy-o. If you were to put this in the third person  plural, youd get the similarly well-known French expression Allez-y! The idiomatic meaning of allez-y in colloquial French is something like Go on! or Off you go! Here are some other examples of how you might use this phrase in conversation: Il est tard, allons-y.   Its getting late;  lets go.Il y a un nouveau resto cà ´tà © du cinà ©ma, allons-y.   Theres a new restaurant next to the movie theater.  Lets go (eat there).Tu veux apprendre le japonais? Moi aussi, allons-y!   You want to learn Japanese? Me too. Lets go / Lets do it!Vous à ªtes prà ªts? Allons-y!   Are you ready? Lets go!Allons-y maintenant! Lets go now.OK, allons-y. Okay, lets go.Allons-y, ne nous gà ªnons pas!  (ironic usage)   Dont mind me !Allons bon, jai perdu ma clef maintenant!   Oh no, now Ive lost my key !Allons bon, voil quil recommence pleurer!   Here we go; hes crying again !Eh bien,  allons-y  et voyons sil disait la và ©rità ©.  Ã‚  Well,  lets go  and see if he was telling the truth.Alors,  allons-y. Oà ¹ mettez-vous les mains?  Ã‚  Go on then. Do you put your hands like this?Enfin, puisque vous insistez,  allons-y.   Oh, well, if you insist.  Come  on.Je suis partante,  allons-y, ici, t out de suite.  Ã‚  Im ready.  Lets do it. Right here, now.A quoi cela ressemblerait-il? Alors  allons-y.  Ã‚  What would it look like? Lets  begin. Sinon, remontons nos manches et  allons-y.  Ã‚  Otherwise, lets roll up our sleeves and  get on with it.

Business english and communication Assignment Example | Topics and Well Written Essays - 1500 words

Business english and communication - Assignment Example They also manufacture televisions, storage devices, mobile phones, office equipment--like computers, notebook PCS, monitors, printers, and LCD displays--photography equipment, surveillance equipment, and household appliances. Much of this is usually produced in Korea, and it is shipped to other countries to be sold. Communication is done between staff in the department via memos, messages, meetings, conferences, and phone calls. The HR department communicates primarily through email and phone correspondence, as well as in person. The general manager communicates with them via the same means. The marketing department communicates through the use of memos, emails, phone correspondence, and personal meetings with other staff to determine their next steps to take as far as getting products out to the public. The marketing department also uses press releases to give news to the public about new product releases. Once the marketing department and other company staff meet to determine what their next product lines will be, the production staff is then notified, and they work on producing what will appeal to the public. Samsung corresponds with other companies located in different countries, such as between Korea and the US, to distribute their products as affiliates. The affiliates keep in communication with the main company through email and phone. The function and communication structures of Samsung are very solid, cut, and dry. Staff within the headquarters can communicate with one another quickly and efficiently, as they can meet within offices and hold conferences should the need arise. Disputes within the company can be resolved quickly, and sudden changes can be communicated without much delay. The only weakness that can be seen is that their manufacturers are in Korea, which can present some issues with language barriers. Other than that, Samsung seems to be very well run. Then, there is Microsoft. Microsoft is a

Airline Industry Assignment Example | Topics and Well Written Essays - 1000 words

Airline Industry - Assignment Example This entails enhancing overall air travel and market penetration, given the uniqueness of the European market in terms of labor costs, market size, air travel substitutes, deregulation measures and new-play entry prospects. In the introduction section, the report provides a general view of the European airline industry. The report will also include a summary of the PESTLE analysis (in tabular form), opportunities and threats facing the European airline industry. The reflective report section provides the insights into the processes and factors that affect the industry the industry. The conclusion part will provide an overview of the case study (European aviation industry). Since 1919, countries, especially in Europe, had sovereign rights over the airspace in their territories. National governments took responsibility to regulate the industry. However, from 1944, countries began setting rules touching on economic rights in the aviation industry. For example, the U.S. called for an open skies policy through a multilateral agreement. However, European nations called for the formation of an international regulatory authority to regulate issues such as capacity and traveling fees to build the industry. Since then, the European airline industry has changed, thereby promoting competition. Given the diverse issues discussed above, issues specific to Europe’s aviation sector affect the nature of ‘new entry’ airline performance and overall competitiveness. Captain and Sickles (1997) assert that cost implications affect overall airfare, time-utility, overall efficiency and effectiveness of industry players in promoting air travel as the preferred means of transport in Europe. This captures both short- and long-haul travel be it goods, cargo or passenger travel.

Fingerprinting Kids :: essays research papers

Should parents voluntarily create detailed identification records(including fingerprints) on their children in anticipation of possiblerunaway problems or abductions? (1) Yes. You can never tell when terriblethings will happen to a child, so its best to be prepared. (2) No. Thevast majority of missing children are not abducted. Whether abducted ornot, fingerprinting will do no good. It wastes time and money and pushesus that much closer to the creation of the Orwellian National Data Centerthat Congress rejected fifteen years ago. BACKGROUND: As of early 1983, 11 states had launched programs tofingerprint children.( These were New York, Virginia, Florida, Georgia, NewJersey, California, Pennsylvania, Massachusetts, Nebraska, Connecticut,Rhode Island, Kansas, Illinois, and Indiana.) Most of this activity wasstimulated by the passage of the Missing Children Act in October 1982.What the new law did was to legitimize the use of the FBI's nationalcomputer network,the National Crime Information Center (NCIC) fornon-criminal purposes. All of the programs are voluntary. In some cases the policedepartments retain the records, while in others the fingerprint cards areturned over to the parents for safekeeping. The apparent purpose of theprogram is to help provide positive identification to link either children picked up, or bodies recovered, with missing person notices. Every year about 1 million children are reported missing. Of thesemost, about 800,000, are away from home for less than two weeks. About150,000 of the total missing are abducted; of these two thirds are abductedby a divorced parent. Some of the reasons behind the missing children are not pretty.According to an article in Parade, "about 35 percent of runaways leave homebecause of incest, 53 percent because of physical neglect. The rest are"throwaways," children kicked out or simply abandoned by parents who moveaway. Every state has laws against incest, child abuse, abandonment, childpornography and the procuring of children, but they are rarely enforced." POINT: Conscientious parents should have their childrens' fingerprintsrecorded to help in the event of an abduction; they shouldn't wait until aftersomething terrible happens, but should take reasonable steps now. Thousands of children are runaways, and in many cases it is all butimpossible to determine clearly who they really are. People change, butfingerprints don't. Well-intentioned but misguided civil libertarians worryabout Big Brother. But they tend to overlook the obvious benefits of theprogram and concentrate on wildly imaginative fantasies about Big Brother.If they would come down to earth once in a while, and visit with and sharethe anguish of a family of an abducted child, they would quickly changetheir attitudes. Besides, in most cases the police do not keep the records,the parents do. COUNTERPOINT: Absent some showing that the fingerprinting will actuallyhelp keep children safe and help capture criminals who harm or abduct them,parents should refuse to have their children fingerprinted. In promotingthe child fingerprinting program, police officials tend to be vague abouthow the program will

War

I want you to see where the focus of your essay needs to be. And that focus needs to make an appearance in a carefully thought out and constructed thesis statement. In other words, do you reading and thinking BEFORE you compose a thesis and begin writing. Using that material, as well as what you have been learning about the economic growth and change of theUnited States during the first half of the nineteenth century, explain why a large majority of northerners were steadfastly against the expansion of slavery into the new territories to become states. How did the existence of slavery threaten average white guys? I want to see specific information from the reading in your post. Make sure you understand Helper's argument and the evidence he uses to support It. During the first half of the 19th century, machine and factory use grew popular.The Embargo Act of 1807 started the war of 1812. Discuss this In your discussion board and you should look at other web sources to add to your posts . PBS ran a NOVA video this last summer entitled â€Å"What Darwin Never Knew†. You can find that video at http:mom. PBS. Org/high/nova/evolution/Darwin-never-knew. HTML . This web page has lots of information that explains evolution theory and It Is a good addition to this NC Live video In developing an understanding of how genes adapt to change through time.We know so much more now then we new In Darning's time. Darwin Video Discussion This Is the discussion board for Unit 2. It Is a debate about evolution and how human population will respond In the light of the theory of Global Warming. You should post your original thoughts In a thread that matches your opinion, and then branch out to comment on views that are different than your own. Be sure to comment with supportive documentation from a web page, the book or other source. You can post web links or references In your post.You can subscribe to the forum, ND we will have only one forum for the class to see how It goes wi th organization. Try not to create a new thread unless you have an original thought. Watch the video posted In Chapter 4 on the selecting method applied to debunk pseudoscience myths. Then post your comments here with at least three responses and one wobbled to support your comment. This video Is an extension of how the selecting method Is applied to ensure Information Is accurate and why we need to make sure we use the selecting method.

Metaphysical Principles Are Ultimately Sound - 1801 Words

and to suggest that his metaphysical principles are ultimately sound. Moreover, I shall suggest that if we were to replace his outmoded embryology with what we now know, the Angelic Doctor himself would be more than likely to conclude that ensoulment took place at the moment of conception. Aquinas’s Metaphysical Principles Aquinas’s anthropology is firmly constructed on the foundation of the hylomorphic theory – the idea that all material things are a composite of a material and a formal principle. In the case of the human being, the formal principle is the soul. While it is the form that gives to matter all its particularity, matter itself must be disposed towards the reception of a given form. So, for example, chickpeas must be soaked and cooked if they are to be digested. This boils down (no pun intended) to saying that the matter currently configured as chickpea cannot receive the form of human flesh without first being disposed. Another example, more classically Thomistic, is that wet wood must be disposed – through the process of drying out – to receive the form of fire. When this notion of disposition is applied to human generation it leads to the conclusion that the material element of the human being that is given by the parents in procreation must be ready to receive a rational soul before it can actually receive it. Remember, the parents themselves do not give the child his form (the spiritual soul) because they only contribute something material, namely aShow MoreRelatedTen Great Principles Of Life Purpose1349 Words   |  6 Pagesorganisms. Just like these trees, you have your unique blueprint inside you too! There are seven great principles of life purpose I have discovered through research, working with others, and through my own life experience. These principles are part of Step 5 of my coaching system which is Find Your Passions. 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