Energy
The availability of energy from renewable energy sources is higher than conventional energy sources, but its use is restricted. Technological developments, the increase of social demand and lower installation cost and rapid depreciation, which encourages the use of a source of renewable energy sources in recent years.
Similarly, the challenges to sustainable development model and the change towards a sustainable development model implies a new conception of the production, transportation and energy consumption.
In a model of sustainable development, renewable energy sources, will be considered as a source of inexhaustible energy, and characteristic of a clean energy, with the following features: is the environmental impact of absent or low, its use has not added potential risk indirectly involve enrichment natural resources and is an alternative to conventional energy sources, can gradually replace them.