The GreenCube represents the Green Terrestrial Economy concept that focuses on the prevention of the loss of biodiversity and ecosystem services. So the sustainable economy, whether the blue or the green economy, is the BlueCube or the GreenCube.

The UN Environment Program regards natural capital as a critical economic asset and a source of public benefits, especially for poor people whose livelihoods depend on natural resources.  

A green economy is defined as low carbon, resource efficient and socially inclusive, where growth is driven by such economic activities and assets which  allow reduced carbon emissions and pollution, enhanced energy and resource efficiency, and prevention of the loss of biodiversity and ecosystem services.