'World's first' solar hot air balloon takes flight in the UK
 

The UK's International Balloon Fiesta in Bristol is a celebration of all things hot air ballooning, but this year it's taken a big stride into the future. August 6th saw the maiden public flight of the world's first hybrid hot air balloon, which fl...

http://www.engadget.com/2015/08/07/s...cid%3Drss_semi