Excess Ammonium Nitrate's Environmental Impacts

Steps:

• Excess ammonium nitrate in soil converts to nitrates via nitrification, leading to leaching into waterways.
• This runoff causes eutrophication (algal blooms depleting oxygen), so first consequence is correct (x).
• Second consequence, like direct ozone layer damage, does not occur from fertilizer; it's unrelated to soil chemistry ( / ).
• Option B matches: first correct, second incorrect.

Why B is correct:

• Nitrate leaching defines eutrophication per environmental science, as mobile NO3- ions fuel aquatic nutrient overload.

Why the others are wrong:

• A: Claims both correct, but second (ozone depletion) lacks direct link to fertilizer.
• C: Reverses facts; eutrophication is a real effect, not the false one.
• D: Denies both, ignoring proven eutrophication from nitrates.

Final answer: B