Buckle up for a road trip challenge that shows cleaner ways to travel. Two teams compete to cross the US and Europe using lower-carbon technology with only one rule: lowest co2 emissions win... Read allBuckle up for a road trip challenge that shows cleaner ways to travel. Two teams compete to cross the US and Europe using lower-carbon technology with only one rule: lowest co2 emissions wins. This is The Great Travel Hack.Buckle up for a road trip challenge that shows cleaner ways to travel. Two teams compete to cross the US and Europe using lower-carbon technology with only one rule: lowest co2 emissions wins. This is The Great Travel Hack.