sentences:  Of the rest of the land, or 31.0% is settled (buildings or roads), or 7.8% is either rivers or lakes.Of the built up area, industrial buildings made up 3.8% of the total area while housing and buildings made up 11.5% and transportation infrastructure made up 11.5%.Power and water infrastructure as well as other special developed areas made up 2.3% of the area while parks, green belts and sports fields made up 2.0%.