The food would sail along in small capsules at upwards of 60 miles per hour. As many as 900,000 capsules could be in circulation in the nearly 2,000 miles of air pressure pipe, all of which would be controlled by smart grids that would keep food from crashing into each other. To give some semblance of order, the capsules would generally be organized into little trains of about 300 linked capsules, each spaced about a meter apart.
Now, this idea might seem a little nutty - I'll admit it seems rather fanciful. But the people behind Foodtubes point out the UK transports 180 times more water than food everyday, and all of that is done using pipelines with minimal pollution and no traffic jams.
Up to 200,000 food-carrying trucks could be taken off British roads, which would save 40 million tons of carbon dioxide from being released into the atmosphere.
Link -Thanks, Marilyn Terrell!