desflorestação

The impact of human endeavours on the environment in the struggle to eke out a living through crop and animal agriculture is examined in a holistic context. Analyses focus on all the sources of pressure that modify the vegetation cover of rural Africa, including the effects of fires and burning of biomass, fuel wood extraction and deforestation and land clearing.

En el Ecuador durante siglos los cambios en el paisaje agrario se dieron de manera paulatina, casi imperceptibles, a penas visibles. A finales del siglo XIX y en las primeras décadas del siglo XX las técnicas de producción y los principios consuetudinarios que reglan el aprovechamiento de los recursos cambian de manera más acelerada.

This issue of Unasylva examines how silviculturists are attempting to meet the challenges of today's rapidly evolving forest management objectives.