The major factors that make today's 'land-use crisis' a global issue of greatest concern is:
[A].
The magnitude of the problem on terms of people and areas aaffected, which is unprecedented in history
[B].
The accelerating nature of the processes involved and the increasing irreversibility of their results
[C].
The lack of success (for socio-economic, cultural or ecological reasons) of most agriculture technologies from temperate regions to solve land-productivity problems over large areas of the topics
