The figure for annual benefit for mot or- vehicle travel is based on the sum of costs for gasoline, maintenance, insurance, ... The latter number is estimated from the average number of seats per plane, the seat load factor, the number of revenueanbsp;...
|Title||:||Readings in Environmental Impact|
|Author||:||Peter E. Black, Lee Pierce Herrington|
|Publisher||:||Ardent Media - 1974|