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Biology
Organisms and their Environment
Water Cycle
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Cards (2)
Method:
Combustion of
fossil fuels
O2 conc. in air:
Decreases
CO2 conc. in air:
Increases
Why?
Burning uses up
oxygen
, and produces
carbon dioxide
Method:
Deforestation
O2 conc. in air:
Decreases
CO2 conc. in air:
Increases
Why?
Fewer
trees
means less
photosynthesis
+ Trees are usually
burnt
(
combustion
) +
Decomposition
of tree trunks (
respiration
)