This document outlines the carbon and nitrogen cycles in nature. The carbon cycle involves carbon dioxide in the atmosphere being absorbed by plants through photosynthesis and converted into organic compounds, which are then consumed by animals or decomposed, releasing the carbon back into the atmosphere or oceans. The nitrogen cycle involves nitrogen gas being converted into organic compounds through nitrogen fixation by bacteria or industrial processes, and then converted between different nitrogen forms as it is used by living things and decomposed.

1. CO2 in Atmosphere
Organic compounds
(plants)
Carbonates in
water
Limestone
Coal
Organic Compounds
(animals)
Petroleum
Inorganic
Carbonates
(shells)
Respiration And Decomposition
Carbon Cycle in nature

2. Nitrogen in
atmosphere
Protoplasm (animals) Protoplasm
(green plants)
Atmospheric & Industiral Fixation
Nitrogen Cycle in nature
Ammonia
Nitrogen Fixation
Nitrification
Nitrates
Nitrities
Nitrification
Denitrification
Ammonification