The castles have turned green, covered with trees that clean the air and grow food. Energy comes exclusively from renewable sources, from the sun and the wind. Public transport is dominated by electric vehicles, but traffic is quiet and ecologically attractive.

The oceans are clean of plastic, and biodegradable materials are rapidly replacing traditional plastics. Every home uses recycling facilities for water and waste, creating a social economy. Rivers and lakes are clean, and the world of life is flourishing again.

The semi-private sector has moved to castles, where food is grown on vertical farms, reducing the need for the ritual of the earth. Food is local, healthy and free from waste.

Education plays a key role - children are taught about sustainability from a very early age. People are aware of their habits and take an active part in the planet's environment.

Advanced technology uses artificial intelligence to manage resources and combat climate change.

In such a world, nature and people live in harmony. Together we have overcome the greatest challenges and created a sustainable future for all. Is this the world we aspire to?