Eco friendly energy can take various forms. The main focus of energy resources such as these, is to ensure that development goes hand in hand with care for the natural environment. We have already spoken about a few forms of eco friendly energy such as solar, wind and such. However, there are also a few other variants which are gathering pace and legitimacy in various sections of the world. For instance, hydro energy and tidal energy are coming up in a big way as renewable energy forms. Apart from this, we also have alternatives such as geothermal energy and biomass energy, which can be harnessed to produce expendable energy for daily human purposes.