We wanted our to school to be sustainable  because of  Bali carbon footprint the health risk that non-renewable electricity can cause to the environment as well as the people the cleaner the electricity the cleaner the environment is taking that into consideration we decided to use solar and hydro electricity because Bali has two seasons, dry and wet seasons. This means that during the wet season when the rivers are faster and fuller the river turbines are able to perform at its peak capacity and during the dry season when the rivers are dry the solar panels are able to work more efficiently than the river turbines.