There's a lot of work to be done before this method is ready for the real world, particularly when it comes to handling large-scale production, but it raises the possibility of reliably generating synthetic fuels (such as ethanol and acetic acid) with a minimal impact on the environment. Instead of leaning heavily on fossil fuels or farms, you'd mainly need CO2 and some sunlight. The result still wouldn't be completely eco-friendly, but it would be clean enough that companies that still have to use conventional fuels could do so without making CO2 emissions worse than they already are.