Greenwood City.
In the early morning, thin mist shrouded the entire city like a gauzy veil.
Sunlight filtered through layers of overlapping leaves and spilled onto the streets, where dappled light and shadow swayed in the breeze.
This was a green city that lived in symbiosis with vegetation.
Towering trees blended into the buildings, vines climbed the walls, and green leaves intertwined with brick and stone, as though every house had grown naturally from the soil.
The city's air carried the fresh fragrance of vegetation, and large numbers of Earth's birds made their homes here.
This area had once been severely polluted, but the Greenwood Race's construction efforts had restored its ecosystem.
It had the finest ecosystem of any major city on Earth.
The city's core principle was coexistence with nature. Even its sanitation system was entrusted to plants, relying entirely on their ability to break down waste.
The streets were paved with a special permeable material that allowed rainwater to seep quickly underground, continuously supplying surface plants with ample moisture.
Large numbers of plants capable of decomposition grew along the streets and in gaps between buildings. Their roots secreted a special enzyme that could break down organic waste, such as fallen leaves, food scraps, and even paper, into fertilizer for plant growth.
The city also had several ecological processing stations, each composed of dense plant communities.
Residents' household waste was sorted and sent to these stations, where biodegradable organic matter was rapidly broken down by plants and microorganisms into soil nutrients for the city's landscaping projects, forming a closed ecological loop.
In addition, Greenwood City's rivers and lakes performed some sanitation functions.
Large numbers of low-grade spiritual plants grew in the rivers and lakes, purifying the water and absorbing harmful substances from it.
The city's domestic sewage flowed directly