Sentences with phrase «per irrigation project»

Not exact matches

Above all else, they will have to consider whether they can any longer justify using more than two - thirds of their water for irrigation, especially when many crops are in surplus and, on many irrigation projects, around 40 per cent of the water is lost to evaporation.

Their cities, suburban towns, outposts, road networks, canals, and irrigation projects attest to their large and civilized (meaning agricultural) populations far in excess per square mile than your average hunter - gatherer cultures and their 1 person per square mile population densities spanning the most forbidding deserts, steppes, mountains, and jungles.