Venusian Soil
Amal’s shuttle landed on New Persepolis, the capital city on Venus.
Similar to Mars, Venus was also terraformed for human habitation. When Sol was mostly enclosed by the dyson sphere, Venus’ overall temperature dropped. This allowed its atmosphere to be transformed into something more breathable.
The planet’s atmosphere was thick with carbon dioxide, so humanity employed a great many techniques and machines to force a Great Oxygenation Event. They used different methods, from artificial photosynthesis to specialized ultraviolet light to achieve this.
In the end the result was the same - carbon dioxide was converted into oxygen. They then covered the entire planet with plant life in order to complete the process of making the planet truly habitable.