Everyone's heard of hybrid cars, but what about hybrid airplanes? A solar and biofuel-powered plane is set to make history this June by completing the world's first zero-carbon trans-Atlantic flight. We also spotted an incredible underwater exosuit that allows you to fly through the ocean like Ironman. In other transportation news, Mexico City banned over one million cars as air pollution levels skyrocketed. And a Swedish company created an amazing bicycle cafe that actually purifies city smog.