The USFS has just recently published the Critical Loads Video Series on their YouTube channel. This video series features “how air pollution, specifically excess nitrogen and sulfur deposition, affects species and ecosystems. It also highlights how land managers can use critical loads to assess ecosystem health and guide resource management decisions”. Here are links to each of the seven videos within the USFS Critical Loads series:
• Air Pollution Effects on Ecosystems: What is a Critical Load and Why Does It Matter? • Critical Loads: Lichens • Critical Loads: Herbaceous Plants • Critical Loads: Trees • Critical Loads: Surface Waters—Part I • Critical Loads: Surface Waters—Part II • Air Quality and Healthy Ecosystems: Applying Critical Loads