Oxygen concentration

<?xml version="1.0" encoding="utf-8"?> <svg width="800px" height="800px" viewBox="0 0 1024 1024" class="icon" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M512 511.9m-379.4 0a379.4 379.4 0 1 0 758.8 0 379.4 379.4 0 1 0-758.8 0Z" fill="#00B36A" /><path d="M512 891.4c100 0 190.9-38.8 258.6-102C434.2 838 251 713.2 140.8 433.5c-5.4 25.3-8.2 51.6-8.2 78.5 0 209.5 169.9 379.4 379.4 379.4z" fill="#009957" /><path d="M512 925.5C283.9 925.5 98.5 740 98.5 512 98.5 283.9 284 98.5 512 98.5S925.5 284 925.5 512c0 18.6-1.2 37.3-3.7 55.6-2.5 18.7-19.8 31.8-38.4 29.3-18.7-2.5-31.8-19.7-29.3-38.4 2-15.3 3.1-30.9 3.1-46.4 0-190.3-154.9-345.2-345.2-345.2S166.9 321.7 166.9 512s154.9 345.2 345.2 345.2c40.2 0 79.5-6.8 116.9-20.3 17.7-6.4 37.3 2.9 43.7 20.6 6.4 17.7-2.9 37.3-20.6 43.7-44.9 16.1-92 24.3-140.1 24.3z" fill="#1A1A1A" /><path d="M755 812.3h77.3c7.7 0 13.6 2 17.6 6 4.1 4.1 6.1 9.5 6.1 16.3 0 6.2-1.6 11.4-4.8 15.6s-8 6.4-14.6 6.4H727.7c-7.4 0-13.2-2.6-17.4-7.8-4.2-5.2-6.2-11.4-6.2-18.4 0-4.5 1.3-10.5 4-18s5.5-13.3 8.8-17.6c13.1-17.4 24.9-32.1 35.5-44.5 10.5-12.4 18.1-20.5 22.6-24.4 8.1-7.3 14.9-14.6 20.2-21.9s9.5-14.9 12.3-22.6c2.8-7.8 4.2-15.2 4.2-22.7 0-8-1.5-15.2-4.5-21.5-3-6.4-7.1-11.3-12.3-14.8-5.2-3.5-10.8-5.3-17-5.3-12.9 0-23.1 7.2-30.5 21.6-1 1.8-2.7 7-5 15.4s-4.9 14.9-7.8 19.4c-3 4.5-7.2 6.7-12.8 6.7-4.9 0-9-2-12.3-6.2-3.2-4.2-4.9-9.8-4.9-16.9 0-8.7 1.6-17.7 4.6-27 3-9.4 7.7-17.9 13.7-25.6 6.1-7.7 13.8-13.8 23.1-18.6 9.3-4.7 20.2-7 32.8-7 15.1 0 28 3 38.7 9 6.9 4.1 13 9.5 18.2 16.5 5.3 7 9.3 15.1 12.2 24.4 3 9.2 4.3 18.7 4.3 28.7 0 15.6-3 29.7-9.1 42.5-6.1 12.7-12.3 22.7-18.6 29.9s-16.9 18.6-31.8 34c-14.9 15.4-25 27.4-30.6 35.9-2.2 3.7-4.7 7.7-7.1 12.5z" fill="#1A1A1A" /></svg>