... promises to reduce global C02 levels to around the time period of the pre-industrial revolution within 10 years:

Licht calls his approach "diamonds from the sky."

Licht estimates electrical energy costs of this "solar thermal electrochemical process" to be around $1,000 per ton of carbon nanofiber product, which means the cost of running the system is hundreds of times less than the value of product output.

"We calculate that with a physical area less than 10 percent the size of the Sahara Desert, our process could remove enough CO2 to decrease atmospheric levels to those of the pre-industrial revolution within 10 years," he says.

More at this ref: http://www.sciencedaily.com/releases/2015/08/150819083117.htm