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.
(a) Built-up area; (b) Total energy consumption; (c) Industrial output value; (d) Carbon source of construction land; (e) Urban environmental protection inputs; (f) Urban green space carbon sink.
