The burgeoning value of property, and therefore of land, amongst the world’s most successful cities incentivises developers to maximise floorplates and saleable space, creating buildings that soar ever higher. When these are for commercial uses it is assumed that over-shadowing and other environmental impacts are of lesser concern than they are for residential apartments. A number of projects highlight Singapore’s determination to lead the way in environmental integration in high density urban environments. Estimates of the percentage of green space in cities around the world vary according to where boundaries have been drawn and how land use areas have been calculated. The redundant concrete was recycled as substrate for the new river bed and piled up to create landscaped mounds for public art installations. The bio-climatic effects of prevailing winds blowing over cool areas of landscape, such as water bodies, forests and parks, effectively provide free, natural air-conditioning for cities.