Burning forests causes air pollution with carbon monoxide, more is emitted than absorbed. Deforestation also releases carbon into the air and accumulates in the soil under the trees. This contributes about a quarter to the process of creating the greenhouse effect on Earth.

Many areas left without forests as a result of deforestation or fires become deserts, since the loss of trees leads to the fact that a thin fertile soil layer is easily washed out by precipitation. Desertification is causing a huge number of environmental refugees – ethnic groups for whom the forest was the main or only source of livelihood.

Many forest dwellers disappear along with their home. Whole ecosystems are being destroyed, plants of irreplaceable species used to obtain medicines, and many biological resources valuable to mankind are being destroyed. More than a million species living in rainforests are endangered.

Soil erosion that develops after logging leads to flooding, as nothing can stop the water flows. Floods are caused by a violation of the level of groundwater, since the roots of trees that feed on them die. For example, as a result of extensive deforestation at the foot of the Himalayas, Bangladesh began to suffer from large floods every four years. Previously, floods occurred no more than twice every hundred years.

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