Hydro-power or water power has been in use for many years and is still the most common form of power used today. The draw back of this has been that electric plants could only be built near a water supply and a river would have to be dammed up to create a water fall to turn the turbines. This gives hydro power a limited range for users. ,

Siemens has 6,300 wind turbines all over the world, including their offshore wind Farms., Wind Power uses large wind mills that turn powerful turbines, usually found in large scale wind farms, to create an efficient amount of energy all over the world, providing power to remote areas. , A survey from Siemens USA states that Wind power is the fastest growing energy source in the world. , Sustainable Power may be acquired in some 30 states, unfortunately, not in all 50 of them, from an alternative electricity supplier. Even if your state doesn't offer alternative power, you may still be able to buy green energy certificates. This means that you might have to switch from your current electric company in order to purchase these green tags.

Solar power takes power from the sun and converts this energy into electricity. , Solar energy has been used for many years, mostly to heat water heaters and swimming pools; they have recently produced solar panels that heat residential homes. You can obtain portable solar panels that may be installed on motor homes,boats and caravans. , Solar panels are lighter today than in previous years.

With all the types of energy we have today, people are still researching a more refined and economical source of energy due to the continued use of fossil energy polluting the earth's air. After many years of development and research, a new power cell, called the EFOY (Energy For You), has been produced by the company SFC (Smart Fuel Cell). This new power cell is quiet,, light weight,, environmentally friendly, and it is fully automatic, it can produce energy for caravans, , boats,, cars, and motor homes. There is a distinct difference between a fuel cell and a battery. A fuel cell converts chemical energy directly to electrical energy by using a liquid fuel (methanol) as its power source. They work very well at low temperatures, which make fuel cells more suitable for mobile uses, as it can be used as a generator when no other power is available, and it is completely maintenance free. This low cost energy efficient fuel cell is now available from TSW Comsat, a company in the UK that provides green power equipment.