|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 Ð including
inaction - is now a management choice that we make according to our values.)