In the evening

 The Prince speaks from the garden, in front of the barnhouse, in the evening...

The Prince harvests many products from the garden on a daily basis. Every day he also picks a handful of strawberries. The Prince planted from scratch the 200 plants of strawberries he currently has. Strawberries are delicate plants that require daily care. For four years in a row, the Prince has given these strawberries daily care, allowing their numbers to grow in such a way.

And everything is organic, entirely natural.

It is true the Prince is an engineer. It is what he learnt at university, and the title he has, and what his professional experience was about. Yet in the last years, the Prince has become a constructors of ecosystems. That is perhaps not a well-recognized and well-paid profession for now, yet it is extremely valuable, and because of climate change, global warming, increasing air and soil pollution, it will be a skill that will be much researched in the future.