Students attended a celebration at Oxburgh Hall to mark the end of a five-year programme helping schools to reduce their carbon footprint.
Conservation experts from the National Trust have been working in partnership with Norfolk County Council helping schools to address their energy use.
Schools participating in the programme used 14% less energy than those schools not taking part.
Joanna Rowland, National Trust learning officer and programme manager, said: “The students’ knowledge and awareness of energy issues has increased as a result of the programme. We hope that through skills gained and good practice these young people will continue to make a positive contribution through school and into the workplace.”
Mick Castle, Cabinet Member for Education and Schools at Norfolk County Council, said: “Children need to understand why we must save energy and reduce our carbon footprint because the future of planet is in their hands. The Energy Busters and E-Futures schemes have given children and teachers the skills and knowledge to ensure that they can continue to reduce the energy they use and make their schools greener and more efficient places.”