Nitrogen gas makes up 78% of Earth’s atmosphere ... Sewage disposal and fertiliser run-off increase nitrates level in rivers. Nitrates cause increased growth of aquatic plants and algae ...

Nitrogen is one of the primary nutrients critical for the survival of all living organisms. Although nitrogen is very abundant in the atmosphere, it is largely inaccessible in this form to most ...

Nitrogen gas makes up 78% of Earth’s atmosphere and is an essential component in amino acids and proteins. However, plants and animals cannot use nitrogen gas directly. Nitrates and other ...