Eco-costs are a measure to express the amount of environmental burden of a product on the basis of prevention of that burden. They are the costs which should be made to reduce the environmental pollution and materials depletion in our world to a level which is in line with the carrying capacity of our earth. For example: for each 1000 kg CO2 emission, one should invest €135,- in offshore windmill parks (and the other CO2 reduction systems at that price or less). When this is done consequently, the total CO2 emissions in the world will be reduced by 65% compared to the emissions in 2008. As a result, global warming will stabilise. In short: "the eco-costs of 1000kg CO2 are € 135,-". Similar calculations can be made on the environmental burden of acidification, eutrification, summer smog, fi