How can we reduce European resource use drastically? Examples for Factor X reduction in resource use in Europe

I would like to present the idea of ​​a multifunctional solar roof. The main task is to generate electricity for a solar bike.
This idea of ​​an own power supply I would like to repeat and supplement. A variant of the solar bike is the Solarchopper and it saves resources on two levels.
1. It drives electrically through renewable energies and 2. Saves resources for a necessary charging infrastructure.
At the moment, I drive completely without an external charging current in the summer, and an electric zero-energy vehicle would be possible through larger and more efficient solar modules.
The solar roof of the solar bike can be dismantled easily and it becomes multifunctional. It can be used for solar panels or as a beach shell or as a small balcony plant outside of the season.
Of course, the solar roof is not sufficient for power generation at home, but it could supply the complete LED lighting in the home or in a family home.
Solar modules are complex in their production, because of their multifunctional use, solar modules are used more and more intensively.