It is very pertinent to look at the alternatives to nuclear energy when choosing in what form of energy to invest. For these reasons, diminishing supply and environmental damage, fossil fuels can be ruled out immediately. Enormous problems can be seen with every form of alternative energy. The most efficient source of renewable energy has been hydroelectric power. However, this usually creates more problems than it solves. Building a large dam means that it will flood an enormous region behind the dam, this in turn can displace tens of thousands of people. There are also enormous ecological costs to dam building. An excellent example is the Aswan dam in Egypt along the Nile, which some people may recognize from history class. Not only did thousands loose their homes but the yearly inundation of the Nile, which fertilized the surrounding land for thousands of years, stopped. The subsequent silting up of the river destroyed much wildlife. Solar energy has never lived up to expectations since it is hugely inefficient. A solar panel the size of Europe would be needed to power a city the size of London. See how many people think that is a feasible option. Wind energy is only marginally better using an unsightly wind farm the size of Texas needed to provide the energy for Texas alone. The worst providers of energy out of all choices have been geothermal and tidal energy. They have been hopelessly inefficient because no rocks have been found that are hot enough and no waves have been found that are strong enough. It is most amusing in that not only are most renewable energy sources inefficient but many are also environmentally and ecologically harmful. The opposition to the building of wind farms in certain areas has been strong because wind farms destroy the scenery, being so unsightly and large.