<span>Well think of this, Where as the use of fossil fuels would be less expensive immediately it will save them much more money down the road to purchase solar panels, due to the fact that fossil fuels must be burned to produce energy thus they must pay for all the coal, oil, petroleum, etc. to be supplied with energy that is non- reusable. Where as solar panels utilize the energy of the sun which is free and reusable, and never needs to be purchased.</span>
Answer: b is the answer to this question
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At the center of the Earth is the core, which has two parts. The solid, inner core of iron has a radius of about 760 miles (about 1,220 km), according to NASA. It is surrounded by a liquid, outer core composed of a nickel-iron alloy. The outer core is about 1,355 miles (2,180 km) thick.
