GM's SAIC YeZ

In 2010, GM and SAIC launched a concept vehicle with a difference. Called the YeZ Concept, it works on the principle of photosynthesis to absorb CO2 and emit oxygen. It may seem farfetched but the technology could soon turn into reality. Solar panels on the roof harvest sunlight while wind turbines on the wheels gather air movement. If successful, this artificial photosynthesis or photoelectric conversion will help clean up the air and give us much-needed O2.