Feeding Eight Billion People Time to Get Out of Past Misconceptions

Abstract

"The water necessary to produce the food required for an expanding human population is usually discussed only as an issue of blue water (the water we use from rivers and aquifers). This discussion neglects all the food produced from rainfed farming, which is critical not least in hunger and poverty stricken areas with rapid population growth, areas that depend not on blue water but on green water (the soil moisture used by plants and returned as vapor flow). A shift in water thinking is essential in order to find realistic and sustainable options to feed the world of tomorrow."