this is in order from the top down :
city hall
powerhouse
border patrol
streets
factories
postal service
warehouses / storage buildings
trash / recycling facilities
Hope this helps :)
Rechecked.
you can't fully rely on a secondary source unless it has been rechecked
Experimenting. Experimenting is used in all three main branches of science, physics, chemistry, and biology, and is used in all the sub-branches of science, like marine biology, to make discoveries. Without experimenting, all we know about science would be random guesses.
1. Protection of water resources.
2. Soils formation and protection.
3. Nutrient storage and recycling.
4. Pollution breakdown and absorption.
5. Contribution to climate stability.