Figure 3. Total metabolic emergy of the Dongying-Binzhou urban area from 2000 to 2016.
R, local renewable resources. N0, rough non-renewable resources. N1, local centralized used resources. IMP, import resources. U, total emergy used.
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.