Which gas is most abundant in Earth’s atmosphere? 👤 By The Quiz Wire Editorial Team 🌐 Source Science & Technology Archive ✅ Fact Checked 📊 Difficulty Easy 📅 Last Updated 01 Dec 2025 A. CO2 B. Nitrogen C. Oxygen D. Argon Check Answer 💡 Explanation: Nitrogen makes up approximately 78% of the Earth's atmosphere. 📚 Topics: Earth Science Science 🎯 Exams: CSS GEN NTS PMS
