About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is_____. A. Oxygen B. Cabon Dioxide C. Silicn D. Clay 💾 Save the Page as PDF: 📥𝐃𝐨𝐰𝐧𝐥𝐨𝐚𝐝 𝐍𝐨𝐰! Related Read more articles Previous PostAcid rain is mainly caused by emissions of _____ in the atmosphere. Next PostThe fourth state of matter is____. If the aforementioned Answer is Wrong. Leave a Reply with an authentic source.Cancel reply