Collect rainwater from the roof for gardening. Grow plants indigenous to your area as they usually need relatively little water. Water at night and mulch the soil around plants to reduce evaporation of water. Report water pollution to the Department of Water Affairs anf Forestry, address below. Never dump used motor oil onto the ground or into drains.
Service stations collect used oil.
B.R. Davies and J. Day. Wildlife Society, 1986. R. Fuggle and M. Rabie. Juta, Cape Town, 1992. Department of Water Affairs and Forestry, Pretoria, 1986.