Question

Give an example of a substance that can be used as a natural SPM.​

Answer 1

Explanation:

salts in the form of nitrates, sulphates, carbonates, chlorides, etc.,organic carbon compounds (PAHs, oxides, condensable organic compounds, etc.) (called "organic carbon" and written as OC). trace elements such as heavy metals, etc.,black carbon (BC).

Answer 2

Salts in the form of nitrates, sulphates, carbonates, chlorides, etc.,organic carbon compounds (PAHs, oxides, condensable organic compounds, etc.) (called "organic carbon" and written as OC). trace elements such as heavy metals, etc.,black carbon (BC).