But considering government management and budget , it is more economical to put powerlines overhead due to easy access and earlier repair in cases of problems or emergencies . At present , Grade A copper priced at 50 U .S . cents per ton (Copper , n .d . The per capita income demand for copper in North America in year 2000 was 12 kg (Copper , n .d . It is therefore important to have an effective system of health information and communication among scientists , governments , industry...











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