Define the causes and hazards of deforestation

Rising demand has created incentives to convert forests to farmland and pasture land. Once a forest is lost to agriculture, it is usually gone forever—along with many of the plants and animals that once lived there. NASA imagery reveals extent of Amazon deforestation Effects of deforestation Forests are more than just a collection of trees—they are integrated ecosystems and home to some of the most diverse life on Earth.

Define the causes and hazards of deforestation

Logging affects the environment in several ways. Since trucks and large equipment need to get into the forest in order to access trees and transport timber, loggers must clear large areas for roadways. It also protects the forest floor, which slows down soil erosion.

Effects of Deforestation

Farmers clear the land for crops or for cattle and often will clear acres of land using slash and burn techniques -- cutting down trees and then burning them. Migratory farmers clear a forest area and use it until the soil becomes too degraded for crops.

Then they move on and clear a new patch of forest. The abandoned land, if left untouched, will eventually reforest, but it will take many, many years to return to its original state.

Hydroelectric dams are quite controversial because while they help to power communities, they also contribute to deforestation. Damming opponents believe that the building of such structures not only has a negative environmental impact, but it also opens up the area to loggers and more roads [source: To build a hydroelectric damacres of land must be flooded, which causes decomposition and release of greenhouse gases.

Causes of Deforestation

Local people can also be displaced by dam projects, causing further deforestation when these people resettle elsewhere. Firesboth accidental and intended, destroy acres of forest very quickly. Areas affected by logging are more susceptible to fires due to the number of dried, dead trees.

Milder winters and extended warm seasons due to global warming also fuel fires. For example, certain species of beetle that usually die off each winter are now able to survive and continue feeding on trees.

This feeding causes the trees to die and dry out, making them into kindling [source: Environmental Defense Fund ]. Mining also results in deforestation. Digging a coal, diamond or gold mine requires the removal of all forest cover, not just for the mines but also for trucks and equipment.

Recently, Venezuela denied a corporation called Crystallex permission to dig a mine because of environmental concerns [source: Walter and Bailey ]. Palm oil has been receiving attention lately for its potential as a biofuel and is used in many packaged foods and beauty products.

But palm oil is another cause of deforestation. Its rising prices make it more valuable, and, in response, Indonesian and Malaysian farmers destroy acres of trees to harvest it. For this reason, several countries are currently debating a ban on palm oil as a biofuel.

As cities grow larger to accommodate more people, trees are cut down to make more room for houses and roads. So how does all this deforestation affect us both locally and globally? Read on to find out the negative effects of deforestation.

Did deforestation lead to the steam engine? As miners needed to go deeper and deeper to retrieve coal, the inefficient steam engine needed to become more efficient.

Soon it evolved into the modern steam engine and was the foundation of the Industrial Revolution.Overgrazing is the major cause of desertification worldwide. Other factors that cause desertification include urbanization, climate change, overdrafting of groundwater, deforestation, natural disasters and tillage practices in agriculture that place soils more vulnerable to wind.

Desertification affects topsoil, groundwater reserves, surface runoff, human, animal and plant populations. Deforestation can also be seen as removal of forests leading to several imbalances ecologically and environmentally. What makes deforestation alarming is the immediate and long term effects it is bound to inflict if continued at the current pace.

Video: Deforestation: Definition, Causes & Consequences Deforestation is the clearing of trees without the intent of replacing them or reestablishing a stand of trees. Deforestation definition: deforestation, clearance or clearing is the removal of forest or stand of trees where the land is thereafter converted to a non-forest use.

A forest stand is a close community of trees sufficient in size, composition and location to distinguish it from other nearby communities.

Define the causes and hazards of deforestation

Deforestation means large scale cutting of forests. The forest lands are converted in to farms, ranches and urban areas through deforestation. Another cause behind deforestation is . Deforestation is the second largest anthropogenic (human-caused) source of carbon dioxide to the atmosphere (after fossil fuel combustion), ranging between 6 percent and 17 percent, according to a study published in in Nature.

Deforestation causes | WWF