Completar frases Food WasteVersión en línea filling gaps por isabel andres dominguez 1 be should wasteful have or poorly the feed end is rich bring water this as report eat The world has limited resources and a growing population . By the of this century there could be three billion extra mouths to . So wasting food , this new report says , is a tragedy that not continue . The study says changing the way consumers in the world reject less - than - perfect - looking vegetables in the shops , and large quantities of meat - which requires a lot of resources to to market - could have an impact . But the engineers who wrote report also recommend better use of scarce land and water around whole world . They say that putting more land to agriculture will difficult without damaging the environment , so improving the efficiency of farming vital . The report says better irrigation is the key here , because used in agriculture is often sourced badly : from aquifers which are managed . In some cases , the engineers say , governments and aid agencies exacerbated this problem by sinking boreholes in the wrong places . The also says that irrigating crops through spraying or flooding fields is because so much of the water evaporates . It says that drip trickle methods of irrigation , while more expensive to install , can be much as a third more efficient .