Lecture 27

L1 /

CH3041

Over S-E Australia

CO2 EMISSIONS

• Carbon dioxide concs.
have increased from
270 ppm to 380 ppm with
industrialisation.

• The increase is due
to fossil fuel combustn ,
cement manufacture
& deforestation.

• human 5 x1012 kg / y
natural 158 x1012 kg / y (flux to air)

• Seasonal fluctuations
in [CO2] overlay the general
increase (Mauna Loa).

                  biosphere flux
                  plants
             - spring,summer

air flux respiratn
- autumn, winter


	•Portland Cement CaCO₃ limestone + sand, shale, clay & gypsum.
	 
	• Ca₃SiO₅ Ca₂SiO₄ Ca₃Al₂O₆, Ca₄Al₂Fe₂O₁₀+ CO₂