com/security/2013/12/new attack steals electronic mail decryption keys by taking pictures computing device sounds/ en. m. wikipedia. org/wiki/Van Eck phreaking xpreeli. com/school/STSS2006 decrypt English text. pdf safaribooksonline. This and different measures can minimise environmental affects of hydropower technology. Reference: Urban Kjellen, Managing protection in hydropower projects in emerging markets reviews in arising from engineering reactive to engineering proactive approach. Available at ScienceDirect Elsevier. Generally hydro power is safe than fossil fuel techniques and nuclear as there aren’t any carbon emissions, no waste and no thermal degradation of water. Safety is engineering basic element and fundamental requirement for all operations. Negative affect on human fitness and safety is reduced through comprehensive protection work and well based risk management systems.