Radioactive pollution is a serious problem which originated in the middle of the 20th century, when the humanity revealed the power of nuclear energy and weapon. Radioactive pollution can be of two kinds: natural and anthropogenic. The natural source of radioactive pollution is the Sun and the certain elements which can be found in the bowels of the Earth: carbon, radon, uranium, etc. Of course, this type of pollution is extremely little and it can not cause the negative impact on the natural environment, so the problem is completely different and originates from the harmful activity of the human beings.
FORMS OF POLLUTION IN NIGERIA (A CASE STUDY OF NIGERIA
Lung Cancer: A Case Study
Harvard Case Studies. In most courses studied at Harvard Business schools, students are provided with a case study. Major HBR cases concerns on a whole industry, a whole organization or some part of organization; profitable or non-profitable organizations. Case study method guide is provided to students which determine the aspects of problem needed to be considered while analyzing a case study.
A new study finds that asphalt is a significant source of air pollutants in urban areas, especially on hot and sunny days. Yale researchers observed that common road and roofing asphalts produced complex mixtures of organic compounds, including hazardous pollutants, in a range of typical temperature and solar conditions. Decades of research about and regulations of emissions from motor vehicles andother combustion-related sources have resulted in improved urban air quality. But recent studies show that as those efforts succeeded, numerous non-combustion-related sources have become important contributors of organic compounds. The researchers collected fresh asphalt and heated it to different temperatures.
Research article 02 Nov Correspondence : Xiujuan Zhao xjzhao ium. Further comparison of PM 2. Forecasts with and without the aerosol information were conducted further, and the differences of surface radiation, energy budget and meteorological parameters were evaluated against surface and sounding observations. The offline-coupling simulation with aerosol—radiation interaction active showed a remarkable decrease in downward shortwave SW radiation reaching the surface, thus helping to reduce the overestimated SW radiation during the daytime.