Match these up

1. Human sewage
   
2. Limiting nutrient
   
3. Dead organisms and solid waste
   
4. Human activity
   
5. 80% of air
   
   

Acan cause eutrophication

Bnitrogen gas

Caccount(s) for even more production of nitrogen than nature does

DAmount available can determine how fast growth happens.

Econtain(s) nitrogen compounds that are converted by bacteria to ammonia