Wind
Airflows can be used to run wind turbines. Modern wind turbines range from around 600kW to up to 5 MW of rated power, although turbines with rated output of 1.5-3 MW have become the most common for commercial use.
Wind power is the fastest growing of the renewable energy technologies. Over the past decade, global installed maximum capacity increased from 2,500 MW in 1992 to just over 40,000 MW at the end of 2003, at an annual growth rate of near 30%
Hydro
Energy in water (in the form of motive energy or temperature differences) can be harnessed and used. Since water is about a thousand times denser than air, even a slow flowing stream of water, or moderate sea swell can yield considerable amounts of energy. Due to scarcity of water in Australia, the potential to increase the production of this form of renewable generation are limited.
Biomass
Usually uses of combustible solids, either wood, the biogenic portion of municipal solid waste or combustible field crops. Field crops may be grown specifically for combustion or may be used for other purposes, and the processed plant waste then used for combustion to heat water and to drive turbines. The Carbon Dioxide produced by combustion are captured by the next crop, effectively meaning no additional Carbon Dioxide is introduced into the atmosphere
Solar
Solar energy refers to energy that is collected from sunlight. In Australia photovoltaic solar cell technology (which converts light energy to electrical energy) represents the vast majority of solar generation that occurs.
Renewable Energy is energy derived from resources that are regenerative or for all practical purposes cannot be depleted. For this reason, renewable energy sources are fundamentally different from fossil fuels, and produce virtually no greenhouse gases or other pollutants.