The earth probably started with a large initial inventory of nitorgen just like the asteroids and meterites since nitrogen appears to have been a major constituent of the solar nebula from which both the planets and asteroids formed. For the discovery that meteorites might have brough some nitrogen to earth to have any meaning, there must be some background about either:
1. The initial inventory of nitorgen on earth is somehow lost or sequestered so it was not available for certain note worthy purpose in some theory, and asteroid nitrogen addresses this thorny shortage to make the theory viable again.
2. Although the initial inventory of nitrogen on earth was available, the conditions on earth was not suitable for certain processes involving nitrogen whose end product was subsequently observed, and meteroite provides suitable conditions to enable these processes to occur and the end product delivered to earth.
1. The initial inventory of nitorgen on earth is somehow lost or sequestered so it was not available for certain note worthy purpose in some theory, and asteroid nitrogen addresses this thorny shortage to make the theory viable again.
2. Although the initial inventory of nitrogen on earth was available, the conditions on earth was not suitable for certain processes involving nitrogen whose end product was subsequently observed, and meteroite provides suitable conditions to enable these processes to occur and the end product delivered to earth.
