Engineers at Pennsylvania State University have come up with a clever alternative: Turn it back into fuel. They combine the carbon dioxide with water vapor to make methane, the primary component of natural gas, which can be burned in a generator.
The concept is not new, but the chemical reaction, which also yields oxygen, requires a lot of energy. Some previous attempts have tried using ultraviolet light, with limited success.
The Penn State team says it improved the reaction speed by a factor of least 20, just using regular sunlight. The key is that the gas conversion takes place in the presence of a high-tech catalyst: an array of titanium dioxide nanotubes coated with copper
A similar process was achieved by New Mexico scientists last year. These boys were able to convert CO2 into methane and gasoline. Mind you, the technology is still in its infancy; at the moment, its very energy intensive, and additional research along with breakthroughs in energy (likely solar) will need to be obtained before this process comes up to speed. Still, this is very promising technology, and it may have its place years ahead. Have patience.