All over the world hundreds of thousands of initiatives are being developed to generate sustainable energy. The great majority of these are aimed at solar and wind energy, if only because they are available all over the world. Whats more, the initial investments required are relatively low and are often helped by government support, so even private developments boast a surprising range of solar panels. Another source of sustainable energy is the motion of the sea. Technology to tap this source has also been developed in the Netherlands. In October 2004 the Archimedes Wave Swing generated its first electric power after more than a decade of research and development: power generated by a 420 tonne underwater biscuit barrel resonating up and down to the frequency of the oceans swell off the Portuguese shore.