One of the main sources of water pollution is agricultural runoff. Consider three options to control this problem: (1) a CAC requirement prohibiting irrigation ditches from draining directly into streams or rivers; (2) a direct tax on chemical emissions from farms into streams or rivers and (3) an indirect tax placed on pesticide purchases.
Evaluate these three options in terms of feasibility, enforceability, and—assuming they could be implemented—cost effectiveness and actual pollution reduction.