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Oxygen 1EU = 2000kcal = 400 liters of oxygen
400 liters of oxygen is needed to make the food energy for a person for one day
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Green tract of land 1 EU = 2 square meters of green tract of land
2 square meters of green tract of land is necessary to produce the amount of oxygen needed for a person for one day
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petroleum 1 EU = 0.25 liter of petroleum is burned.
About 1600 liters of oxygen is consumed when 1 liter of petroleum is burned.
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car 1 E.U=A car runs 2.5 km
A car runs 2.5 km with the amount of food energy for a person for one day
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Trash 1 E.U. = 1 kg of trash = the amount of trash for a person for one day
The amount of food energy for a person for one day is equivalent with the amount of energy to burn the trash for a person for one day.
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Electric power 1 E.U. = light a light bulb of 100W for one day
The amount of food energy for a person for one day can light a light bulb of 100W for 24 hours.
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Environmental load and ecological unit
Supporting our present lives, 80 square meters of green tract of land per person is necessary.
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REFERENCE
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Energy consumed/person/day |
2,000 kcal
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Oxygen consumed/person/day |
400 l
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Carbon dioxide produced/person/day |
400 l
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Green field for changing the produced carbon into oxygen |
2m2 |
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Energy for burning garbage |
2,000 kcal/kg
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Energy of oil |
10,000 kcal/l
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Foods,rice |
900 kcal/kg
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OTHERS (Japanese social value)
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National budget |
80trillions
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Population |
120millions
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Garbage/family |
5,000 millions tons / year
1kg / person / day
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Electrical power consumed (1992) |
185326*10 millions kWh
Electrical power consumed / family / month (on another reference)
288 kWh / month
(1kWh=0.239/2.78*10000000=860 kcal)
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Efficiency of thermal power ,about. 40%
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Energy of garbage |
1 / 5 of oil, 2000
kcal / kg
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Electricity necessary to make an aluminum can (20g) |
240 Wh
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Consumed electric power for a portable computer ( FMV TFT liquid
crystal ) |
16W/h
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Consumed fossil fuel |
300 million tons / year
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