There are plenty of cases where insensitive environmental management has been ignored or opposed. Numerous countries have countered soil erosion by tractor-ploughing terraces and planting trees. The costly measures have frequently failed – often the locals simply let their livestock graze and kill the trees, or even dig up the terraces. This is because they have no other land, see no need for the earthworks, or have no access to tractors or labour to maintain the measures. Environmental managers need to ensure development is ‘in tune’ with local needs, environment and social situation, and is understood by local people.