Pollution is when something is added to the environment which is harmful or poisonous to living beings. Pollution is when something is added to the environment which is harmful or poisonous to living beings. Smoke in the air from factories is a type of pollution as it is bad for the lungs when breathed in. Sewage in drinking water is another type of pollution, which can make people ill because it contains germs and viruses. People living next to a building site where there is too much noise can become sick as they cannot sleep or relax. This is called noise pollution. Adverse air quality can kill many organisms including humans. Ozone pollution can lead to respiratory disease, cardiovascular disease, throat inflammation, chest pain, and congestion.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on June, 2014