Environmental change in general, and climatic change in particular, are likely to impact significantly upon resources such as water and soils, transforming present day landscapes and their ecological characteristics. As a consequence, disruptions of socio-economic activities in sensitive regions of the globe can be expected in coming decades. Agriculture is at particular risk, especially in areas where prolonged droughts, sea level rise, enhanced natural hazards, or extreme meteorological events such as floods or mudslides threaten marginal existence. Disruptions and risks may have large...