# Describe four harmful effects of deforestation on the environment.

> Cambridge International IGCSE Biology (0610) — 20.2 Habitat destruction · Describe · 4 marks

## Mark scheme (4 marks)

1. Deforestation can lead to the extinction of species that lived in the destroyed habitat.
2. Without tree roots to anchor the soil, soil erosion occurs, reducing soil fertility.
3. Deforestation increases the risk of flooding because trees slow the movement of water to the ground and allow water to be absorbed into the soil.
4. Fewer trees means less carbon dioxide is absorbed by photosynthesis, so carbon dioxide levels in the atmosphere increase, contributing to global warming.

## Key terms

- [deforestation](https://www.gradenine.co.uk/glossary/deforestation)

## Related

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Source: [GradeNine](https://www.gradenine.co.uk/q/describe-four-harmful-effects-of-deforestation-11261aee) · Published by Druglandscape Ltd.