Alternate energy resources

Automobiles use fossil fuels extensively. Fossil fuel production may reach in its peak in the year 2015. Thereafter fossil fuel production will decline gradually. A maximum of 100 more years, fossil fuels can serve as an energy source for human kind. After that, only alternate energy sources will help. So a serious study in the field of alternate energy sources is required. Water power is an option. Hydroelectric power plants use water stored in reservoirs and tidal plants use ocean tides.  But these options may harm environment badly. Nuclear power is another option. Nuclear power is obtained from nuclear fission reactions. Uraniun-235 isotope is used here. But safety concern is a big issue in nuclear power plant.  The solar energy is another option. It is environment friendly and readily available anywhere in the world. Wind power is an option but equipments are very much expensive. Geothermal energy is an option where energy is extracted from the molten interior of the earth.