A major pillar of green web hosting is utilizing renewable energy instead of conventional, fossil fuel based energy. Servers consume vast amounts of energy both conventionally and kinetically by operating fans to cool them. In fact it is said that “By 2020 the web hosting industry will be as big of a polluter as the airline industry!”
Renewable energy is defined as any source of energy generated from natural sources which are naturally replaced. However using this definition – one might say that oil is a naturally occuring, naturally renewing source. So we append this definition with “Energy that is generated from natural sources that does not produce any significant amount of pollution through either production, generation or maintenance.”
Simply put, renewable energy is wind power, hydroelectric, photovoltaic (solar), biomass, geothermal or biofuel.