The main categories of market-oriented approaches to pollution control are

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BlackTom AI · Accepted Answer

The question asks for the main categories of market-oriented approaches to pollution control, and provides four option sets to evaluate.
Option 1: 'redefined property rights; pollution permits; marketable charges.' This combination blends redefined property rights with pollution permits and marketable charges, but the phrasing 'redefined property rights' is not a standard, widely accepted category name in the classic trio of market-based approaches. The typical trio centers on charges, property rights (or defined rights), and permits rather than this exact ordering.
Option 2: 'marketable permits; better-defined property rights; pollution charges.' While each element appears related, the term 'better-defined property rights' is a descriptor of the improvement rather than a standalone category. The established framework typically lists 'pollution charges,' 'extended property rights' (or well-defined property rights), and 'marketable permits' as the core categories, not a mixed phrasing that emphasizes the refinement of property rights as a separate category.
Option 3: 'pollution charges; extended property rights; marketable permits.' This matches the conventional three-part classification used in environmental economics: (a) pollution charges (a standard as a price-based instrument), (b) extended or clearly defined property rights (enabling trading and efficient allocation), and (c) marketable permits (emissions trading). Collectively, they form the main market-oriented approaches to pollution control.
Option 4: 'pollution permits; defined property rights; marketable charges.' While this option includes three relevant elements, the order and naming swap the emphasis relative to the standard set. It lists 'pollution permits' (okay) and 'defined property rights' (acceptable), but it groups 'marketable charges' instead of the more commonly used 'pollution charges' term, and the phrasing is less aligned with the standard taxonomy that distinguishes 'pollution charges' as a distinct instrument from permits.
In summary, among the provided choices, option 3 best aligns with the classic tripartite categorization of market-oriented pollution-control tools: pollution charges, extended/defined property rights, and marketable permits. The other options either rephrase or reorder components in ways that deviate from the standard terminology and widely accepted grouping, which can lead to confusion about the fundamental instruments involved.

The main categories of market-oriented approaches to pollution control are

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