Final answer:
Oil was the resource that polluted Kuwait's land and water during the Persian Gulf War when Iraqi forces dynamited oil wells, causing extensive environmental damage.
Step-by-step explanation:
The resource used to pollute Kuwait's land and water during the Persian Gulf War was oil. When Saddam Hussein's Iraqi forces realized they would lose Kuwait, they deliberately caused extensive environmental damage by sabotaging oil facilities. Approximately 750 oil wells were dynamited, creating horrific fires and causing large amounts of oil to flow into the Persian Gulf and onto the desert sands. This resulted in severe pollution, killing many marine and land organisms and leading to serious health concerns due to air pollution.