For EEcredit 4.3, It is my understanding that a long term contract for purchasing green power would satisfy this requirement. My questions are does the 30% refer to a yearly aggregate and what constitutes "renewable energy" for the LEED program (i.e. wind, small hydro, wood biomass, etc)?
The 30% is based on the yearly aggregate. For a definition of renewable energy, see the website www.green-e.org. Renewable Resource Energy is defined as: Sources of electricity, such as solar, wind, geothermal, biomass and small hydroelectric. A resource is called renewable if it can be naturally replenished. In general, renewables have lower emissions than non-renewables. Applicable internationally.