Unit 3 - Deforestation

The biggest problems are when deforestation occurs on an industrial scale. Large areas of rainforest are lost each year to mining, and exotic timbers, like teak and mahogany, are deliberately and illegally felled for furniture making and building. Deforestation is also used to provide land to grow crops for making biofuels and to provide cattle and rice fields for food production.

8,000 years ago, much of Western Europe, including the British Isles, was heavily forested. These forests contained many food chains and food webs and some of the top predators included wolves and bears. Although there are still a lot of trees around, the area covered by forests is a tiny fraction of what it was before humans started to clear the forests in order to grow their crops and build their settlements.

But what are the problems associated with deforestation?

Removal of trees contributes to global warming by removing the chance for carbon dioxide uptake by those trees, so less carbon dioxide is removed from the air. It reduces biodiversity and exposes the soils to erosion creating barren land, flooding, mudslides and landslides. Deforestation can nowadays only be prevented by political means in the countries involved, but the economic loss to those countries is a major issue.