Effects of air pollutants on cold-desert cyanobacterial lichen crusts and rock lichens: chlorophyll degradation, electrolyte leakage, and nitrogenase activity
May 4, 1990
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.
