I want to buy a hybrid prius
A hybrid vehical is great because it uses two different kinds of power.
I want one for environmental reasons
That is is very forward thinking of you. The electric generator that powers the electric motor is much better for the environment.
My thoughts exactly trying to not damage the environment any more than I have to but still have to have a vehicle, 
Other hybrid vehicle power sources include: electric bicycles, mopeds, and even small scooters are a simple type of hybrid. 
That is interesting what else can you tell me about hybrids? always trying to learn more about them\
Hybrid vehicle
A hybrid vehicle uses two or more distinct types of power, such as internal combustion engine to drive an electric generator that powers an electric motor, e.g. in diesel-electric trains using diesel engines to drive an electric generator that powers an electric motor, and submarines that use diesels when surfaced and batteries when submerged. Other means to store energy include pressurized fluid in hydraulic hybrids.
The basic principle with hybrid vehicles is that the different motors work better at different speeds; the electric motor is more efficient at
, using the same Aisin Seiki T110 transaxle as in the Toyota Camry Hybrid.
The 2011 Infiniti M35h uses a different system of one electric motor and two clutches.
In 2010 Toyota and Mazda announced a supply agreement for the hybrid technology used in Toyota's Prius model.
General Motors, DaimlerChrysler's and BMW's Global Hybrid Cooperation is similar in that it combines the power from a single engine and two motors. In 2009, the Presidential Task Force on the Auto Industry said that "GM is at least one