And now for something completely different... good news on the climate front?

In a new study published in Materials Today Energy, 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.

The researchers hope that the new technology, called C2CNT (CO2 to CNTs), will offer an indisputable economic incentive to remove excess CO2 from the atmosphere. They calculate that, if they were to set up solar thermal stations over an area equal to 4% of the Sahara Desert, they could reduce the CO2 concentration of the atmosphere back to pre-industrial levels in 10 years. They note that a more realistic implementation would be to set up stations on the oceans, where there is more available surface area.

Full article these quotes and image were taken from (found on phys.org - I recommend phys.org as a decent portal for science news and I am not affiliated with phys.org in any way):
https://phys.org/news/2017-07-co2-emissions-worth-millions.html
"Cleaning up CO2 emissions could be worth millions"
July 19, 2017 by Lisa Zyga

Go straight to the horse's mouth - here is the original scientific paper reporting the research findings as published in peer reviewed journal Materials Today Energy: http://www.sciencedirect.com/science/article/pii/S246860691730165X