Which gas is the primary driver of the enhanced greenhouse effect? By Kalsoom Tahir ✅ Fact Checked 📊 Difficulty Medium 📅 Last Updated 13 Aug 2026 A. Oxygen B. Nitrogen C. Carbon Dioxide D. Methane Check Answer 💡 Explanation: CO2 is the most significant long-lived greenhouse gas in Earth's atmosphere, driven by fossil fuel combustion. 📚 Topics: Environment and Conservation Environmental Issues 🎯 Exams: CSS GEN NTS PMS