Many people point to hydrogen as the new clean fuel.
While it is true that using hydrogen in a fuel cell results in the ultimately clean water and carbon dioxide, there remains this vitally important question: where does the hydrogen come from?
Hydrogen can come from two types of source: one results in a true fuel, while the other amounts to a type of energy storage.
Hydrogen can be derived from organic sources such as methane or natural gas.
Wind energy is a very hot topic these days - wind turbines seem to be growing like mushrooms, and wind farms are popping up everywhere.
Wind powered devices have been around for a long time - Dutch-style wind mills come to mind.
Here is a list of some methods for creating renewable energy:
Separate articles briefly summarize each type of energy source.
Article by Hugues de Milleville
This section contains information to help you use less energy.