Question

2. Explain why the sun, wind, water, and fossil fuels are called 'primary sources'.​

Answer 1

Explanation:

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. ... The sun provides more energy in an hour than the United States can use in a year!

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Answer 2

Explanation:

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