the total to the damaging chimicals i.e the duration of exposure and the concentration of the chimicals must be taken into account..this s the end of pragraph i wish to benefit it ok

Humain rights
The concept of human rights has existed under several names in European thought for many centuries, at least since the time of King John of England. After the king violated a number of ancient laws and customs by which England had been governed, his subjects forced him to sign the Magna Carta, or Great Charter, which enumerates a number of what later came to be thought of as human rights. Among them were the right of the church to be free from governmental interference, the rights of all free citizens to own and inherit property and be free from excessive taxes. It established the right of widows who owned property to choose not to remarry, and established principles of due process and equality before the law. It also contained provisions forbidding bribery and official misconduct.
The political and religious traditions in other parts of the world also proclaimed what have come to be called human rights, calling on rulers to rule justly and compassionately, and delineating limits on their power over the lives, property, and activities of their citizens.
In the eighteenth and nineteenth centuries in Europe several philosophers proposed the concept of "natural rights," rights belonging to a person by nature and because he was a human being, not by virtue of his citizenship in a particular country or membership in a particular religious or ethnic group. This concept was vigorously debated and rejected by some philosophers as baseless. Others saw it as a formulation of the underlying principle on which all ideas of citizens' rights and political and religious liberty were based.
In the late 1700s two revolutions occurred which drew heavily on this concept. In 1776 most of the British colonies in North America proclaimed their independence from the British Empire in a document which still stirs feelings, and debate, the U.S. Declaration of Independence
Business
In economics, business is the social science of managing people to organize and maintain collective productivity toward accomplishing particular creative and productive goals, usually to generate profit.
The etymology of "business" refers to the state of being busy, in the context of the individual as well as the community or society. In other words, to be busy is to be doing commercially viable and profitable work.
The term "business" has at least three usages, depending on the scope — the general usage (above), the singular usage to refer to a particular company or corporation, and the generalized usage to refer to a particular market sector, such as "the record business," "the computer business," or "the business community" -- the community of suppliers of goods and services.
The singular "business" can be a legally-recognized entity within an economically free society, wherein individuals organize based on expertise and skills to bring about social and technological advancement.
In predominantly capitalist economies, businesses are typically formed to earn profit and grow the personal wealth of their owners.
The owners and operators of a business have as one of their main objectives the receipt or generation of a financial return in exchange for their work — that is, the expense of time and energy — and for their acceptance of risk — investing work and money without certainty of success.
Notable exceptions to this rule include some businesses which are cooperatives, or government institutions.
However, the exact definition of business is disputable as is business philosophy; for example, some Marxists use "means of production" as a rough synonym for "business"; however a more accurate definition of "means of production" would be the resources and apparatus by which products and services are created.
Control of these resources and apparatus results in control of business activity, and so, while they are very closely related, they are not the same thing.
Socialists advocate either government, public, or worker ownership of most sizable businesses. Some advocate a mixed economy of private and state-owned enterprises. Others advocate a capitalist economy where all, or nearly all, enterprises are privately owned.
Business Studies is taught as a subject in many schools



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unifying human revolution 
Licklider had moved from the Psycho-Acoustic Laboratory at Harvard University to MIT in 1950, after becoming interested in information technology. At MIT, he served on a committee that established Lincoln Laboratory and worked on the SAGE project. In 1957 he became a Vice President at BBN, where he bought the first production PDP-1 computer and conducted the first public demonstration of time-sharing.
At the IPTO, Licklider recruited Lawrence Roberts to head a project to implement a network, and Roberts based the technology on the work of Paul Baran who had written an exhaustive study for the U.S. Air Force that recommended packet switching (as opposed to circuit switching) to make a network highly robust and survivable. After much work, the first node went live at UCLA on October 29, 1969 on what would be called the ARPANET, one of the "eve" networks of today's Internet. Following on from this, the British Post Office, Western Union International and Tymnet collaborated to create the first international packet switched network, referred to as the International Packet Switched Service (IPSS), in 1978. This network grew from Europe and the US to cover Canada, Hong Kong and Australia by 1981.
The first TCP/IP-wide area network was operational by January 1, 1983, when the United States' National Science Foundation (NSF) constructed a university network backbone that would later become the NSFNet.
It was then followed by the opening of the network to commercial interests in 1985. Important, separate networks that offered gateways into, then later merged with, the NSFNet include Usenet, BITNET and the various commercial and educational networks, such as X.25, Compuserve and JANET. Telenet (later called Sprintnet) was a large privately-funded national computer network with free dial-up access in cities throughout the U.S. that had been in operation since the 1970s. This network eventually merged with the others in the 1990s as the TCP/IP protocol became increasingly popular. The ability of TCP/IP to work over these pre-existing communication networks, especially the international X.25 IPSS network, allowed for a great ease of growth. Use of the term "Internet" to describe a single global TCP/IP network originated around this time.

Terrorism
Terrorism is a term used to describe violence or other harmful acts.they are classified terrorism into six categories.Civil Disorders.Political Terrorism .Non-Political Terrorism.Quasi-Terrorism.Limited Political Terrorism .Official or State TerrorismTerrorist attacks are often targeted to maximize fear and publicity. They usually use explosives or poison, but there is also concern about terrorist attacks using weapons of mass destruction. Terrorist organizations usually methodically plan attacks in advance, and may train participants, plant "undercover" agents, and raise money from supporters or through organized crime. Communication may occur through modern telecommunications, or through old-fashioned methods such as couriers.The context in which terrorist tactics are used is often a large-scale, unresolved political conflict.The type of conflict varies widely; historical examples include:
Secession of a territory to form a new sovereign state
Dominance of territory or resources by various ethnic groups
Imposition of a particular form of government, such as democracy, theocracy, or anarchy
Economic deprivation of a populationOpposition to a domestic government or occupying army

A revolution
A revolution (from Late Latin revolutio which means "a turn around") is a significant change that usually occurs in a relatively short period of time. Variously defined revolutions have been happening throughout human history. They vary in terms of numbers of their participants (revolutionaries), means employed by them, duration, motivating ideology and many other aspects. They may result in a socio-political change in the socio-political institutions, or a major change in a culture or economy. Scholarly debates about what is and what is not a revolution center around several issues. Early study of revolutions primarily analyzed events in European history from psychological perspective[citation needed], soon however new theories were offered using explanations for more global events and using works from other social sciences such as sociology and political sciences. Several generations of scholarly thought have generated many competing theories on revolutions, gradually increasing our understanding of this complex phenomenon


CANCER

There are several types of cancers. They are all characterized by an uncontrolled growth of abnormal cells and their spread in some parts of the body. 
An estimated 153 100 new cancer cases and 70 400 deaths from the disease occur in Canada in 2006. The cancer diagnosed most frequently remains breast cancer among women and prostate cancer in men. The main cause of death associated with cancer especially among women than among men continues to be lung cancer. 
Reduce your risk: 
Eat better 
Be more active 
Protect yourself from the sun 
Do not smoke 
Avoid secondhand smoke 
Report to the doctor any changes to your health 
Pass the cancer screening tests 
Handle hazardous materials carefully 
Health Canada, in collaboration with the Public Health Agency of Canada continues to monitor the disease by identifying trends and risk factors in developing programs to reduce the risk of cancer and doing research to assess risks relating to the environment and behaviour. 
Risk Factors 
There are several risk factors linked to cancer, including: 
Tobacco is the cause of 30% of all cancer deaths in Canada and is the leading cause of lung cancer cases - one of the most easily preventable. 
Poor diet - rich in fat - is the cause of approximately 20% of cancer deaths. There is a link between diets rich in fats and cancers of the colon and prostate cancers. 
Other risk factors are the workplace, family history, alcohol consumption, elements related to reproduction, sexual activity, solar radiation, drugs and ionizing radiation.

Brain Drain 
Brain drain or human capital flight is an emigration of trained and talented individuals (" human capital ") to other nations due to conflicts, lack of opportunity, health hazards where they are living or other reasons. It parallels the term " capital flight " which refers to financial capital that is no longer invested in the country where its owner lived and earned it. 
Investment in higher education is lost when a trained individual leaves and does not return. Also, whatever social capital the individual has been a part of is reduced by his or her departure. Brain drain can occur either when individuals who study abroad and complete their education do not return to their home country, or when individuals educated in their home country emigrate for higher wages or better opportunities. The second form is arguably worse, because it drains more resources from the home country. 
This phenomenon is perhaps most problematic for developing nations, where it is widespread. In these countries, higher education and professional certification are often viewed as the surest way to escape from a troubled economy or difficult political situation.Even though little has been discussed about the effects of brain drain in Africa, it is believed to be one of the biggest issues to the developing nations. Each year millions of Africans escape to Europe and the states; therefore, the continent is using lot of its human capital 
To conclude, I believe that brain drain is a major problem that our continent has to face up to. It is obvious that developing countries such as Morocco are even losing more human capital than developed countries. 
Brain Drain 
Brain drain is the departure of educated or talented persons for better pay or jobs elsewhere. The term originated about 1960, when many British scientists and intellectuals immigrated to the United States for a better working climate. 
Economically speaking, brain drain means an emigration of trained and talented individuals (" human capital ") to other nations because of conflicts and lack of opportunity. It parallels the term " capital flight " which refers to financial capital that is no longer invested in the country where its owner lived and earned it. 
When a highly qualified professional chooses to leave his own country for another, he does so for one or several legitimate political or economic reasons: peace and security for himself and his family, job satisfaction, better pay and conditions, a higher standard of living, etc. Throughout history, countries and centres of academic excellence which offer these attractions have received the largest numbers of professional migrants and these have, in turn, e substantial contributions, not only to the economic growth of their host countries, but also to the scientific and technological advancement of humanity. The loss of such bog number of skilled immigrants results in huge losses that are very difficult to compensate for even in long years to come. The brain drain is actually affecting the economies and social structures of a country, especially the emerging countries that have to do everything they can to stop this phenomenon. 
Finally, I do believe that it is the responsibility of both governments and individuals to try harder to stop the flow of highly skilled people from their own countries resulting in a brain drain that affects each and every society. 
Advances in technology 
Technology is a broad concept that deals with a people’s usage and knowledge of tools and crafts , and how it affects man’s ability to control and adapt to its environment . In human society, technology is a consequence of science and engineering . In the last two centuries, humanity has witnessed great technological developments that are not to be paralleled with any other past times in history. These technological advances range from the invention of the light bulb to the latest wireless computers and internet devices. But what are the implications of these technological advances on our societies. 
To begin with, technological advances have helped people use tools and materials that e life easier for them. To give one example, the use of the phone and the internet has e it extremely possible to communicate with any person on any other part of the world. So, the limitations in communication that we had in the past are all over by now. Academically speaking, students no longer rely today entirely on books to look for the information they need to do a research. Rather they are invited now to search the internet and get ready-e information that saves both time and effort. Spatially speaking, people managed to set their foot on the moon and discover things that were in the past only myths for many of us. 
However technological advances have had also their negative sides. To illustrate to that, internet use has e the gap even greater between those who have access to it and those who don’t. Let us remember that there are those who can’t have yet access even to electricity to use all those technological advances which seem to be e mainly for those who have the means to buy it. The advances in telecommunication have also e people more selfish in the sense that everyone now has his/her mobile phone; and we no longer have family conversations or calls for the whole family. Every one holds private conversations on the phone that other can’t know about. For all these reasons, I believe that one has to look at the other side of the coin and believe that technological development is double-edged. 
To conclude, and as far as I am concerned, technological advances are a major step in the development of nations and societies and it is imperative to make good use of those developments and make it accessible to all individuals in the world