Many nations count on coal, oil and natural gas to supply their energy needs. All of these are finite resources and can be depleted at any time. Alternative Energy Options are energy sources that are renewable, which means they are continually replenished. The most common types of renewable energy includes water, wind and the sun. Renewable energy sources are more cost effective compared to their counterparts and are usually more environmentally friendly. They produce no pollution or greenhouse gases, and will never run out.