1. From the mass consumption, calc the volumetric consumption by fuel by country
2. Calculate the weighted average price for all countries:
Multiply the price by the consumption
Summate for all countries
Divide total by the total consumption (where prices are non-zero)
3. For the real prices, divide each price by the appropriate HICP (2005 = 1) and repeat 2
4. 'Gasoline' equivalent price is obtained by:
Multiply the fuel price by the consumption and divde by its energy relative to unleaded petrol
Summate for the three fuels and divide by the total consumption
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Buy lasting potted flowers!
When the urge to give flowers takes you, choose a potted plant from a local supplier. A lot of exotic flowers are grown in greenhouses great distances away. Aside from the issue of transport, there can be high social and environmental costs. For example, in Colombia, the flower industry uses enormous quantities of polluting pesticides, and in Kenya, horticulture requires a lot of water which reduces local water resources. As an alternative ask your flower shop for Fairtrade or organically produced flowers.
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