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In a new study published in Materials Today Energy, the researchers have shown that they can use CO₂ and solar thermal energy to produce high yields of millimeter-length carbon nanotube (CNT) wool at a cost of just $660 per ton. The market value of long CNTs like these—which can be woven into textiles to make metals, cement replacements, and other materials—is currently $100,000-$400,000 per ton.

Read more at: https://phys.org/news/2017-07-co2-emissions-worth-millions.html#jCp