Passage Summary: Throwing away old electronics and fridges is dangerous because they have poisons in them that can leak into the water or air unless they are put in a very well-managed landfill.

Reasoning: Old appliances contain toxic materials like mercury and lead; these are safe in proper landfills but contaminate water or air if the landfills are poorly run or if the items are burned.

Analysis: Since this is a set of facts, we need to find a deduction that is strictly supported by the text. The stimulus establishes a clear 'if-then' relationship: if disposal isn't done in a properly operated landfill, environmental contamination (either in water or air) is a likely result. You should look for an answer that synthesizes these risks, perhaps suggesting that the presence of these specific pollutants in the environment indicates a failure in the disposal or landfill process. Avoid any choices that make broad claims about all types of waste or all types of pollution.