Q1ai
Q1aii
Q1bi
calcium carbonate
calcium chloride
calcium nitrate
calcium sulphate
Q1ci
Q2a
Q2bi
Q2bii
Q3a1
Q3a2
Q3b
how water enters the atmosphere
how water leaves the atmosphere
Deforestation
Destruction of peat bogs
Global warming
Pollution of streams
Q3d
Q4a
Q4b
Q5a
Q5b
Q3ci
Q3cii
Q3ciii
Q1cii