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The steps involved are:
 
The steps involved are:
 
* Max-impact - we need a good estimate for the maximum CO<sub>2</sub> impact. You would expect that getting something from an island in the Great Ocean (20.000km away) would have the most impact, but is better than transporting something from Greece to France by truck. We set the maximum impact at the largest distance by maritime mode. This might punish road transport as well.
 
* Max-impact - we need a good estimate for the maximum CO<sub>2</sub> impact. You would expect that getting something from an island in the Great Ocean (20.000km away) would have the most impact, but is better than transporting something from Greece to France by truck. We set the maximum impact at the largest distance by maritime mode. This might punish road transport as well.
* Country centroid - is used as
+
* Transportation Mode - when we do not know the mix of transportation modes used between countries, we will assume that the worst mode has been used, i.e. the mode with the worst impact.
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The formula for the score is then:
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 +
<nowiki>score<sub>origin</sub>(country) = 100 - max(CO<sub>2, origin</sub>(maritime), CO<sub>2, origin</sub>(road)) / max<sub>all origin</sub>(CO<sub>2</sub>(maritime))*100</nowiki>
    
=== Transport environmental impact ===
 
=== Transport environmental impact ===
3,393

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