Sergio de Otto is the representative of the Renewable Foundation, an institution that has its origin in a city movement that tries to promote a change on the energy model. This foundation wants to change the current energy model, based on the energy creation using fossil fuel (oil, charcoal, gas) and nuclear power stations. The change of model must be based on the energy saving, efficiency and the production of energy created with renewable energy sources (solar
energy, wind power, biomass, etc.) Sergio describes all the problems caused by the use of non-renewable energy sources, among them, the global warming and the viability of changing the situation thanks to the use of energy created by renewable sources of energy.