medium · LSAT Logical Reasoning

The city's new recycling initiative has been a resounding success. Since its implementation last year, the total volume of waste sent to the local landfill has decreased by 25%. Clearly, the initiative has changed the residents' disposal habits.

Which of the following, if true, most seriously weakens the argument?

  1. Around the same time, the city began shipping a large share of its non-recyclable trash to a landfill in a neighboring state.
  2. Taking part in the recycling program is entirely optional, and residents who simply ignore it altogether face no penalty whatever.
  3. Surveys conducted citywide show that residents have felt noticeably more environmentally conscious ever since the initiative first began.
  4. Running the recycling initiative each year has cost the city nearly 10% more than its planners had originally budgeted for it.
  5. No other comparably sized city anywhere in the surrounding region has achieved so large a reduction in its landfill waste.

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