Peugeot promises fuel-saving Hybrid Air system in cars by 2016

It's far from the first automaker to attempt a car that runs on compressed air, but Peugeot Citroen is now touting a new system that it says could be available in at least some of its small cars by 2016. As suggested by the "Hybrid Air" moniker, this system doesn't run solely on air -- it also incorporates a traditional gasoline engine that Peugeot promises will combine for a 90 percent increase in vehicle range in urban driving, or offer up to 50 minutes of driving without using any gas. The ga...