Footage of a tank clearing a forest - bulldozing trees.
Footage of new caterpillar tractor pulling lifeboat...
Demonstration of 'super bulldozer' for open cast mining.
West Indians work in diggers to clear the way for a road.
A glimpse inside giant warehouses full...
Out takes...
Beautiful butterflies are reared at this butterfly farm in Kent.
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Crops are sprayed to kill a plague of butterflies on a field in Krasnovar in Russia.
Footage of Lepidopterist Mrs Rivers tending to her cocoons in Dartford, Kent.
Butterfly farmer develops a new skill - preserving dead...