Mary and Dave have a conversation in class. They conclude that nearly all water pollution takes place in surface water—water on the ground and on top of lakes and ponds. This is pollution they can see. Does your experiment support this claim? Explain your answer.















Mary and Dave have a conversation in class. They conclude that nearly all water pollution takes place in surface water—water on the ground and on top of lakes and ponds. This is pollution they can see. Does your experiment support this claim? Explain your answe