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for human population are between 8.5 and 10 billion, with a worth case scenario estimate of in excess of 100 billion. If human population continues to increase at anything like the rate it did during the last century then sustainable development of forests is likely to be neither possible nor important. For such a massive population, relying on ever more sparse natural resources, under conditions of climate change; sustainable forest management would likely be the least of their worries. Probably the most important element in the search for sustainable forest management in the light of the trend in human population is simply the increasing recognition of the scale of the problem. There is a clear and increasingly pressing need for solutions, locally, nationally and globally. Over the course of the next 20 years, the global demand for wood is expected to increase by an average of 84 million cubic metres annually; almost double the current levels. Where will this increasing demand come from, Sutton has argued that the only possible solution is a massive and immediate investment in forest plantation, but there seems no political will to undertake such a policy in any major country.
 
Why do we need trees?
 
That global warming is a phenomenon; and that at least some o this is anthropogenic in source, seems now beyond doubt. Global warming appears to have been relatively slight to this point, perhaps 0.6oC over the last century, but by 2030 perhaps another 1-4.5oC are expected, unless human action is greatly curtailed; but with airline fuel set to become the single biggest source of greenhouse gasses, an ever increasing appetite fir cheap air travel and a total lack of political will to make the difficult and unpopular decisions to put tax on airline fuel, there seems little hope that the rate of global warming will decline.
 
The most obvious reason we need trees is that they act to remove carbon from the atmosphere by means of photosynthesis, secondary to this they also act as a massive carbon store. Burning trees releases vast amounts of carbon back into the atmosphere, although it has to be noted that not all trees that are cut down will be burned.
 
What is the role of technology in the case?
 
Due to the limitations of the word count it seems that the most appropriate method is to examine one area of the implementation of technology for the sustainable development of forests; this being remote sensing. The general role of remote sensing, within the framework of sustainable development, is not well understood. Remote sensing has been a valuable source of information over the past few decades in mapping and monitoring forest activities. There is an ever increasing need for quality information, and given an improving level of technology in remote sensing, particularly from satellites, this technology is set to become critical in sustainable forest development in the future; but what is remote sensing?
 
Remote sensing is usually defined as being comprised of 2 separate yet distinct activities:-
 Data collection by sensors usually designed to detect electromagnetic energy. They are sometimes ground-based, but more usually aerial or satellite based.
 Interpretation of the collected data.
 
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