If hydrogen were to replace fossil fuel entirely, the researchers estimate that 60 to 120 trillion grams of hydrogen would be released each year into the atmosphere, assuming a 10-to-20-percent loss rate due to leakage.
The Fire TV can have a wired connection, the Fire TV Stick is wireless only. The Fire TV has Dolby Digital Plus & 5.1 surround sound, the Fire TV Stick is Dolby Digital Plus only. The Fire TV can do all Amazon games including hi-res video games, the Fire TV Stick only has a limited set of games it will play.
The Fire TV Stick is the baby version of the Fire TV, which is more like the Roku; a full-fledged streaming device. The stick is more like Google's $35 Chromecast; it plugs into your TV's HDMI port and it's powered by microUSB. The Amazon Fire TV stick also boasts 4x the storage and 2x the memory of Chromecast, plus a dual-core processor and 1 GB of memory.