Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.
It serves directly to assist a rapid distribution of goods at reasonable prices, I thereby establishing a firm home market and so making it possible to provide for export at competitive prices.
Data collected from nutrition surveillance and feeding centers indicate growing Numbers of children are suffering from acute malnutrition, a condition which if not treated quickly can lead to death.
Measures include weighting lines so they sink quickly and do not entice birds, setting lines at night, and setting off bird-scaring lines - made up of multi-coloured streamers to startle seabirds.