In condition of globalization of the world economy, demand for electricity is rising extremely. Currently, oil, natural gas, coal and uranium are the world's major sources of energy. Due to the continuing use of limited natural resources, environment to reserves are depleting from year to year and it made an impact. According to economists, if the world's natural resources are used in this way, the world's oil reserves could provide us from 45 up to 50 years, coal 165-170 years, natural gas 70-75 years, brown coal 450-500 years