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400<br />

Gass i<br />

Nordsjøen<br />

Kr./tonn CO2<br />

300<br />

200<br />

100<br />

Olje i<br />

Nordsjøen<br />

Bensin<br />

Kull<br />

Lett<br />

mineralolje<br />

0<br />

1991 1992 1993 1994 1995 1996 1997 1998<br />

Tung<br />

mineralolje<br />

Koks

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