Geothermal energy utilizes the natural heat of underneath rocks to heat water to steam. The steam is then used to turn turbines and generate electricity. The water is usually recycled by being injected back to the ground to make sustainable use of the water. However, this process of injecting water in the ground may contaminate the groundwater in aquifers. The water can, therefore, be unsuitable for human use such as watering of plants and animals including household use.
