The Australian landscape has long exhibited salinity, and many soils have long been compact and infertile. The problems we perceive as the many individual issues in the previous slide really reduce to one issue. Our impact on the land and soil, through changed use, is such that the landscape no longer supplies us with the clean air and water, food, retention of biodiversity, etc, that we regard as desirable. (This, of course, is a very human-centric view of the world, but we can no longer remove our influence on the landscape, so anything we do including inaction - is now a management choice that we make according to our values.)