A gardener plants bamboo to create an attractive environment along the roadside. The bamboo grows into the garden of his neighbour, who removes the bamboo with a chemical spray.
What cannot be concluded about the outcome of the planting?
1 )
It increases external cost and external benefit.
2 )
It increases private cost and private benefit.
3 )
It increases social cost and social benefit.
It increases social cost more than social benefit.
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