4 ms·http://www.virginearth.com/finalists/ http://www.virginearth.com/finalists/by terramars 11y agohttp://www.virginearth.com/finalists/ http://www.virginearth.com/finalists/ph0rque 11y agoThat's a great list, but I'd love to see a table of carbon sequestration tech, and how much it costs per ton of CO2 sequestered.rch 11y agoCoal bed CO2 sequestration can be profitable, depending on the price of natural gas.