1 If the ball hits the ceiling it is called out of bounds in international volleyball. 2  Some leagues allow play continue after ball hits the ceiling. 3  If a player commits a fault or violation when playing the ball. 4  To read more details about the faults and violations, go to basic volleyball rules pages.
Environmental impacts. Hydropower is emission-free, renewable energy which does not cause any emissions into the air, water, or soil. The construction of hydropower plants changes waterways and their natural conditions.The main environmental impact during production is caused by the regulation of the waterways.Fortum actively moderates this environmental impact.ortum moderates the environmental impact in many ways. Fortum actively moderates the environmental impact of hydropower production in areas affected by the power economy. The impact on the fishing industry is reduced by stocking fish and restoring habitats.
Benefits of Hydroelectric Power. Hydropower offers an array of benefits over fossil fuels but still faces environmental challenges. Since it is fueled by a large water source, it does not cause air pollution like coal and natural oil. In addition to that, hydroelectric power plants play an essential role in the irrigation of dry agricultural lands. Let us discuss more advantage of hydroelectric power. 1. No use of fuel. The main advantage of hydroelectric power is that no fuel is required during the production process. In other words, hydroelectric power plants make use of water sources to generate electricity .