Racing cars built by pupils demonstrate green power
More than 1,000 pupils have been showing off their green credentials at Newquay Airport in Cornwall.
Primary and secondary schools from Devon and Cornwall were taking part in the Greenpower electric car challenge organised by Cornwall College.
Competing vehicles were designed and built by students using a 240-watt electric motor, four car batteries and other sustainable materials.
The aim is to encourage an interest in engineering and green technology.
Penair School's Green Lightning was overall winner, with Newton Abbot College's Team Lucy runner-up and Richard Lander School's Racing One coming third.
They will now go through to a national final at the Goodwood race course in the autumn.
Pupils from Richard Lander School in Truro won the Formula 24 "sustainability" category for Racing One.
"The competition is called green power and a lot of people take the electric motor to be the 'green' part, but we've really taken it on board as an ethos," teacher Darren Pascoe told BBC News.
About 97% of the materials used in Racing One are biodegradable.
The car is made from wood, stuck together with traditional glue made from animal hide and bones.
Silk was also used to cover the wood on the outside of the car for extra strength.
Goran Primay School won the sustainable award for primary schools.