Passage Summary: If we want the economy to grow, we need more food. Since we can only get more food without hurting nature by changing how we farm, we should change our farming techniques if we choose to grow the economy.

Conclusion: If we want to maintain economic growth, we must fundamentally change our farming methods.

Reasoning: Economic growth requires higher agricultural output, and the only way to increase that output without destroying biodiversity is to move away from conventional farming.

Analysis: This argument has a 'missing link' between the facts provided and the recommendation made. The premises tell us how to increase production *without reducing biodiversity*, but the conclusion assumes we actually care about protecting biodiversity while we grow the economy. To justify the conclusion that we *should* modify techniques, we need a principle that mandates the protection of biodiversity during economic expansion. Look for a rule that says something like: 'If a goal requires a specific action to avoid environmental harm, that action should be taken.'