This time the Planet Mechanics are tackling one of the world’s biggest problems, traffic pollution.
(02:12)Now it’s time for Dick and Jem to proudly reveal their new thoroughbred delivery vehicle to the expectant new owners.
(04:55)The next morning, and the whole bike has to be stripped down to get to the heart of the problem.
(02:55)Jem’s working on the mounts for the air tanks. They’re coated with carbon fibre, a material that can’t be welded. He...
(02:55)The next morning and the Planet Mechanics’ eco-workshop is up and running. Dick and Jem are in the south of England on their...
(02:52)So they’re building a moped powered by fresh air. They’ll replace the petrol engine with an air motor and the gas tanks...
(02:55)This time the Planet Mechanics are tackling a tricky challenge down on the farm. Can they tame this fuel-guzzling monster, by...
(02:02)Fortunately they still have the oil they made earlier. So it’s time for the ultimate test: will that oil fire up the grain...
(01:47)A few weeks later, Dick and Jem are back and can’t wait to see how much the gas tank has risen.
(02:57)To drive the press, they’re salvaging this scrap lawnmower and will convert its petrol engine to run on biogas.
(02:57)Is there anything else on the farm they can use to fuel the grain dryer?
(02:36)Although the tank seems leak proof, Dick and Jem are taking no chances with their potentially explosive gas plant. They’ve...
(02:52)Andy has tipped them off about a tank. They could fill this with cow slurry and use it as a digester to make biogas.
(02:25)Grain can’t be stored if it’s too wet. Trouble is the average British summer means crops sometimes have to be harvested...
(03:00)The Planet Mechanics are trying to save one of the world’s most beautiful cities – Venice.
(01:57)They’re worried that the engine might not be strong enough but to get the boat onto the plane, Alberto will need to give it...
(02:19)Alberto has designed a marathon test for the solar-powered water taxi. The route will take at least two hours and they’ll...
(02:54)Alberto wants to base their water taxi on one of the boats that was made in his boatyard. He’s lending them a traditional...
(02:51)Dick and Jem travel to Italy to take on one of the world’s most polluting forms of transport -motor boats.
(02:43)The Planet Mechanics are battling to conjure up electricity out of thin air. They must make England’s most remote youth...
(01:57)