| CEE | CO2 emission efficiency |
| PCR | Potential CO2 emission reduction |
| R&D | Research and development expenditure |
| COMP | Urban population density |
| Road | Urban Road area per capita |
| Green | Green space area per capita |
| V | Average annual rate of expansion |
| EII | Expansion intensity index |
| GDPP | GDP per capita |
| IS | Industrial structure |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.