It is very important to understand that if you do not have access to generate or purchase green energy then converting a vehicle to electric power might have a NEGATIVE impact on the environment. 

For instance, in Australia, 90% of the electricity is generated using coal as the fuel source. Coal is a very inefficient fuel and creates 1kg of CO2 greenhouse gases per usable kWh which is as much or more than car petrol engine.

See this study www.ilea.org/lcas/taharaetal2001.html

What is green energy?

• Green energy is electricity generated from renewable energy sources.
• The most common forms of green energy are;
  • Hydro-electric.
  • Wind powered generators.
  • Photo-voltaic (solar cells).
  • Biomass (methane from rubbish dumps and sewerage plants, bagasse from sugar cane waste). 
• Many electricity suppliers offer more expensive tariffs to supply consumers with green energy.

For information about which companies in Australia provide green energy try this site; http://www.cana.net.au/electricitywatch/

For more general information about green energy in Australia try this site; www.greenpower.com.au