The data are taken from a McKinsey report. I have compared only renewable energy technologies and carbon capture and sequestration (CCS) on this figure. The size of the circle approximately indicates the relative CO2 abatement potential in megatons of CO2 equivalents. (The report indicates that energy conservation, mainly by switching off electronics and computers, switching from incandescents to CFLs constitutes "low-hanging fruit". On the other hand, clean energy technologies such as wind, solar PV etc. require some investment in order to realize CO2 emission reductions. The cheapest among the renewables is producing cellulosic biofuels. Another obvious "low-hanging fruit" is the reduction of industrial non-GHG emissions; 250 MTCO2 equivalents at next to nothing prices represents a huge source of cheap carbon credits.This is my first SVG file (created using Gnuplot).