Europe has never made a secret of its determination to contribute to the fight against climate change. In order to take part in this battle, there's only one thing to do: cut greenhouse gas emissions. Of these, the one that affects all citizens is CO2, the gas that comes from the consumption of fossil fuels. Cars, electricity and heating are the main domestic vehicles of it. In Malmö, Sweden, a whole district has been designed to use only renewable forms of energy.