Greenpeace

CO2 can be recovered from the air by passing it through a solution
thats basically calcium hydroxide. Huge artificial trees can capture
CO2 en masse. CO2 can be converted, using energy from solar power,
into methanol and artificial hydrocarbons (AH). Methanol and AH are high enough energy density to drive our economies, via combustion and fuel cells.

When burned, the methanol  and AH releases CO2 into the atmosphere, where its captured again via the large artificial trees. This is the closed loop.

As a result, we can reduce CO2 concentrations to pre-industrial levels, and drive the world's economy with an infinitely renewable resource (CO2 plus solar power). All countries will be energy self-sufficient because everyone can access the atmosphere's power supply (CO2).

That fixes global warming....now if i could just figure out my cell phone's features :-)

James Danforth, CEO
Workinout.com