Most commonly used air routes, in million passengers a year. Displayed as flights most easily replace by train and flights possibly replaceable by train and ship.
Energy cost of building material range from 1 to 2800. Energy consumed measured in kilowatt hour per cubic metre for stone, sawn timber, concrete, brick, cement, PVC, steel and aluminum.
For developing countries (i.e. non-Annex I countries), data is either old or missing. To better reflect the truth, data from 2000 is chosen to overlap from IEA (dashed circles).