When a group of people wants to build something or try something new,
they should try to figure out ahead of time how it might affect other people.
NSES Content Standard E
Science and Technology: Understanding about science and technology Grades K-4, page 138 People have always had problems and invented tools and techniques (ways of doing something) to solve problems. Trying to determine the effects of solutions helps people avoid some new problems. NSES Content Standard F
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