For some years I have been working on a assessment tool, which overcomes some disadvantages of current tools. Like (avoiding) the use of weighing factors, and the absence of depletion of resources. Exergy research has been the driver behind this, and the methodology works under the name of MAXergy: maximising energy and materials exergy within the earth system. . It resulted in a Closing Cycles Calculation tool , which uses Embodied Land as the general indicator: the land needed to absorb solar radiation, from outside the system earth, to supply the exergy growth on earth, or to compensate the entropy growth from materials depletion. Its still in the development phase, but a workable version is available now as 2.0 . The info is available via a new website: maxergy.org.