In the world’s major cities, people don’t need to wear face masks, because smog and fine particle pollution are no longer a problem. Electric vehicles hum through the streets. An optimized, sustainable energy supply brings electricity to end users. Intelligent heating and cooling systems keep it comfortable inside buildings. Nature supplies the energy: sun, wind and water. Is this a fictional world, or a reality that is not all that far away?
The elements sun, wind and water represent the future of our energy supply. Renewable energies are sustainable superheroes when it comes to escaping our dependence on fossil fuels, such as petroleum.