Introduced by Eric Simms.
Wherever a large area of water is exposed to the air some of it will evaporate and form water vapour, and this is part of the great natural cycle which is traced in this programme.
(to 11.45)
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Introduced by Eric Simms.
Wherever a large area of water is exposed to the air some of it will evaporate and form water vapour, and this is part of the great natural cycle which is traced in this programme.
(to 11.45)