More specifically, five priority areas for investment were identified in the New Deal, these being: (a) energy efficiency in buildings, (b) renewable energy technologies, (c) sustainable transport technologies, (d) ecological infrastructure, including forests and (e) sustainable agriculture, including organic production. Also noted was the possibility that the “Green economy” was just a new way to promote “sustainable development”. These were biocapacity (defined as the amount of biologically productive area - cropland, pasture, forest, and fisheries - that is available to meet humanity's needs), water and energy. All three require an assessment of the ecological footprint when determining how to use these resources, in order to ensure ongoing sustainability and building in resilience to climate change is becoming a critical issue.