Handling dangerous substances has come to define our society. We drive around with the explosive equivalent of twenty sticks of dynamite in our gasoline tanks without batting an eye. We use open flames to cook our food and heat our homes. Propane barbecue tanks are sold everywhere in the country, and left outside our homes for several seasons. This activity challenges your students to think about how this versatile and potentially dangerous substance could be of great value in preserving our high standards of living.
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