1. Wetlands are part of the ecological system and help to retain water and provide moisture.
2. She said the vineyard was on limestone that acted as a sponge to retain water for the vines in hot summers.
3. The gene affects a brain chemical called neuropeptide arginine vasopressin and mostly affects blood pressure through the body's ability to retain water.
4. Deeply rooted vegetation is also good for helping retain top soil and for water preservation.