The phosphorus cycle

Phosphorus is a chemical element found on Earth in numerous compound forms, such as the phosphate ion (PO4

Nitrogen is the most abundant element in our planet’s atmosphere. Approximately 78% of the atmosphere is made up of nitrogen...

Phosphorus is a chemical element found on Earth in numerous compound forms, such as the phosphate ion (PO4

The Earth is an active planet. Earthquakes shake and volcanoes erupt. Sections of the crust are on the move. Mountains...