Should Blackfen Basin Farms Limit Fertilizer Runoff? Debate Kit

Resolution: "The state should require farms in the Blackfen Basin to limit the fertilizer runoff that leaves their fields, even though meeting the rule would cost farmers money."

Format and roles: Divide the class into an affirmative team (supports the rule) and a negative team (opposes the rule). Each team gives an opening statement, a rebuttal round, and a closing statement. Assign a few students as judges who score with the rubric, and one student as a moderator who keeps time.

Background: Fertilizer adds nutrients, mainly nitrogen and phosphorus, that crops need to grow. When rain falls on a field, some fertilizer washes off with the water. This is runoff. Because it leaves many fields across a wide area rather than one pipe, it is called a nonpoint source, which is hard to measure farm by farm. Downstream, extra nutrients can feed a sudden overgrowth of algae called an algae bloom. When the algae die and rot, they use up oxygen in the water. Most fish need dissolved oxygen above 5 mg/L, so a large bloom can leave fish gasping and can foul the water a town draws for drinking. The Blackfen Basin drains into Pinch Gap Lake, the drinking-water source for the fictional town of Larkin Hollow.

Case for requiring the limit:

1. Extra nitrogen and phosphorus can trigger algae blooms that drop dissolved oxygen below the 5 mg/L most fish need, which can kill fish and spoil a drinking-water source. (Source: standard water-quality benchmark, EPA/USGS.)
2. Wastewater treatment plants already must meet strict discharge limits, holding treated water to a monthly average of 30 mg/L or less for key pollutants, while much farm runoff faces no such limit. Supporters call this unfair. (Source: EPA secondary treatment regulation, 40 CFR 133.)
3. A fictional Larkin Hollow water district statement, written for this debate, reports that the town spent extra money treating its water after two summers of algae blooms in Pinch Gap Lake. (Illustrative testimony created for this debate, not a documented figure.)
4. Simple practices, such as planting a buffer strip of grass along streams or using cover crops, can cut runoff without stopping farming. Supporters argue a rule would spread these proven practices.

Case against requiring the limit:

1. Nutrients are a resource, not only a pollutant. Fertilizer grows the food that feeds people, and farming worldwide already accounts for roughly 70 percent of freshwater withdrawals, so productive farms matter. Cutting fertilizer too far could lower harvests. (Source: FAO / UN Water for the water-use figure.)
2. Runoff is a nonpoint source that leaves many fields at once, so it is hard to measure how much comes from any single farm. Opponents argue a rule would be unfair to enforce when no one can prove which farm caused a problem.
3. A fictional Blackfen Basin farmers' cooperative, speaking for this debate, argues that buffer strips, cover crops, and testing cost real money and time, and that many family farms run on thin margins. (Illustrative testimony created for this debate.)
4. Voluntary conservation programs, which pay farmers to adopt runoff-cutting practices, can lower runoff without a mandate. Opponents argue cooperation works better than a rule farmers resent.