1. what is the single most important potential driver of energy independence through renewable energy?

2. what two steps being currently employed could have a meaningful impact on extending the useful life of fossil fuels?

3. what does the energy ratio tell us? what does an energy ratio of 10 tell us?

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.

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