THE catastrophic changes in Nepal's economy, described by David Nicholson-Lord ('Finding the right trek', Review, 3 October) are obvious because they have happened so quickly. Who are we to criticise others for lack of wisdom or foresight? As in other affluent countries, we also suffer from 'fouling of air and water by chaotic traffic, industrial effluent and sewage'. We also have problems with deforestation, soil erosion, water disposal and fuel conservation. But we have no excuses. Not only do we behave with insane recklessness towards our own local environment, but we export this lifestyle to countries which cannot possibly cope.