There a plenty of people who use hydrogen in the gas balloons, even in places where helium is cheaper Here's some info: http://www.balloonfiesta.com/gas-balloo

There a plenty of people who use hydrogen in the gas balloons, even in places where helium is cheaper Here's some info: http://www.balloonfiesta.com/gas-balloons/gas-ballooning-faqs http://www.balloonfiesta.com/gas-balloons/gas-ballooning-faq... but there is more to be found.