Birmingham was the penultimate stop on the Prince's 8-day tour
The Prince of Wales brought his message of living a more sustainable life to Birmingham with a visit to the city's Thinktank Science Museum.
HRH was on the latest stage of his START campaign, launched in February 2010, to encourage people to become more energy efficient.
Prince Charles led a group of school children around some exhibits including ones which highlighted recycling.
The Prince also met with local business leaders at Millennium Point.
Energy efficient message
On show for the Prince of Wales were a variety of electric-powered vehicles including a racing car.
He also spoke with school children about the importance of recycling everyday items and the virtues of trying to live more sustainable and energy-efficient lives.
Two "Eco" cars would race the Royal Train back to London
The Prince was then shown the world's first hybrid car - the Lanchester Petrol-Electric Mark 7 Prototype - which was build in 1926.
Before leaving the Prince talked to television presenters Gabby Roslin and Kevin McCloud as they prepared to take part in a race back to London in two specially-designed "Eco Cars."
The Prince of Wales will conclude his week-long series of visits in London with a discussion of the issues brought up on his tour.