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This study presents an overview of optical communication in the emerging world of telecommunication technologies. Some network approaches in achieving the potentials of the optical communication have been highlighted. Increased focus on photonics is drastically revolutionizing communication systems and is expected to form the next generation of information based technologies with optical communication base. With increased demand on bandwidth, optical network will continue to play a leading role in the future success of telecommunication which is the driving force of globalization.
Concentrations of lead in street dust in selected cities of Aba, Abakaliki, Enugu and Onitsha were determined. The results showed the overall mean lead concentrations for five streets in each of the four Cities selected for the study; Aba (345.994±27.12 mg kg 1), Abakaliki (162.154±16.24 mg kg 1), Enugu (322.508±24.43 mg kg 1) and Onitsha (291.978±34.34 mg kg 1). The lead concentrations for each of these four Cities studies correlated positively with commercial, industrial and vehicle traffic emission in these cities.
