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Science is created by scientists, who are people; naturally science serves people.
How people use science to solve the question
Practical Science are people who do experients to explain the Science theories.
science is very important to people.
People need science to learn how to feed the world's burgeoning population.
People need science to learn how to draw water from the well.
People need science to learn how to properly build a shovel to DIG the well.