This paper discusses and contrasts two mainroles of forestry in light of the debate on theglobal climate. As the main problem is relatedto the increases of the CO<Subscript>2</Subscript>-concentrationin the atmosphere, forests may be viewed aspart of the alleviation of the problem throughtheir function as (i) a source...</subscript>

This study develops a model for wildlifemigrating seasonally between a conservationarea and a neighbouring area. When beingoutside the conservation area, harvesting takesplace by a group of small-scale farmers. Thelocal people have two motives for harvesting;to get rid of ``problem'' animals as...

The paper analyses the social optimal management of terrestrial animal species where land-use costs, non-consumptive benefits of the wild species and nuisance costs, in addition to harvesting profit, are taken into account. When there is harvesting, it is demonstrated that increased...