Google Project Loon Balloons To Blanket Indonesia With Internet (thestar.com)
An anonymous reader writes: Google's Project Loon is set to deliver high-speed internet access to more than 100 million Indonesians. The Project Loon program will fly clusters of balloons as high as 60,000 feet above Earth to transmit high-speed Internet signals down to Earth at LTE speeds. Google has been working with mobile network operators; XL Axiata, Telkomsel, and Indosat. “The emotional distance of the world is shrinking, thanks to the communications we enjoy today,” said Sergey Brin, who oversees the X lab as Alphabet’s president.
There's no practical reason you couldn't fill unmanned high altitude balloons with hydrogen.