Overview: Gas–it makes a balloon go up, cooks our food, and fills our lungs. But this invisible state of matter does far more, and has a very visible impact on the world. We follow natural gas from well tip to stove top and trace its use from 3rd century BC Chinese salt producers to modern appliances. Next, we investigate the most plentiful gas in the universe–hydrogen–which may also prove to be the most powerful. We also experience the cryogenic world of industrial gasses–what they do and where they come from–as we travel to the British Oxygen Company's Braddock Air Separation Plant to see how they freeze millions of tons of oxygen and nitrogen. And at the Bush Dome Helium Reserve in Texas, we learn why the US government sits atop 36-billion cubic feet of the stuff. Finally, we look inside the colorful world of gas and neon lights. So lay back, breathe deep, and count backwards from 10…