While nitrogen is an essential nutrient, its availability is naturally limited, making it an important factor in regulating the structure and functioning of both terrestrial and aquatic ecological systems.
The structure and functioning of terrestrial and aquatic ecological systems are regulated by nitrogen.
yeah yeah but what really annoys me is the way we in the United States have been converting to metric we have a eighty nine Chevy Blazer and before that we had a Horizon uh you know Plymouth Horizon