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it is a home that is powered by energy resources
Sounds like a turbine to me.
They are a car that uses gas as a source of energy.
efficent
That's means energy. No, 'efficient' means getting the best out of the energy that you are using. Energy in itself can be used efficiently or inefficiently.
Try to use less, and not to waste energy. Some things you can do include walking or using public transportation instead of using a personal car; using modern light bulbs that use less energy; turning light bulbs (or any other device) off when you don't actually use them.
What are iran's energy sources?
That depends on the source. Solar energy is raidaint and counts as renewable, if you could collect radiant energy form naturally occurring sources they would be renewable, in many cases the radiant heater though not renewable in large structures like aircraft hangars are more energy efficent.
The energy sources that I am most excited about all have lower carbon emissions, compared to conventional energy sources. These include Biomass Energy, Wind Energy, Solar Energy, Geothermal Energy, and Hydroelectric Energy sources.
Of course they do. Every PC is different in how it works and how energy efficent it is depending on which make, model and even company you buy from.
A generator is a device that converts mechanical energy into electrical energy by electromagnetic induction - it "generates" (or creates) electricity.A generator is a mechanical device which converts mechanical energy to electrical energy. Generators may be driven by a broad range of sources; steam turbines, electricity, petrol, or oil, natural gas, wind, and even water (hydroelectric).