# 149 Undesirable Effects Of Deforestation

Deforestation is the removal of large areas of woods to provide land for farming as well as roads, and to supply timber (wood) for building, slice of furniture as well as fuel. Deforestation has a lay out of undesirable effects on the environment.

Deforestation: 

• Reduction of habitats or nutrient sources for animals, which tin order notice resultant inwards their extinction. Animal as well as constitute diverseness is reduced, as well as nutrient chains are disrupted.

• Loss of constitute species as well as their genes which may live on of import for medical piece of job or genetic technology scientific discipline inwards the future.

• Removal of trees way in that location are no roots to gibe soil, which tin order notice resultant inwards soil erosion as well as leaching of minerals. Desertification tin order notice eventually occur.

• Lack of roots as well as soil à flooding and mudslides. Lakes tin order notice larn silted up.

• Leaching of nutrients into lakes as well as rivers à eutrophication.

• Less CO₂ is absorbed from the atmosphere, to a greater extent than CO₂ build up à  increase the greenhouse effect.

• Less O₂ is produced à atmospheric O₂ grade tin order notice drop.

• Less transpiration à reduced rainfall. 

Try this

Figure below show the expanse of tropical rainforest deforested annually inwards v dissimilar countries, labeled A to E.

1. i) Which of the countries shown has the largest expanse deforested annually? 

                                                                                                     [1 mark]

   ii) Which of the countries shown has 600 000 hectares of rainforest removed each year?                                                                                     [1 mark]

  iii) In unopen to other country, F, 550 000 hectares are deforested annually. Plot this on a re-create of the figure.                                                                      [1 mark]

2. i) Country E has a full of ix 000 000 hectares of tropical rainforest remaining. How long volition it live on earlier it is all destroyed, if the introduce charge per unit of measurement of deforestation continues?                                                                                    [1 mark]

  ii) Stat two reasons why tropical rainforests are beingness destroyed past times humans.

                                                                                                    [2 marks]

  iii) After deforestation has taken place, soil erosion oft occurs rapidly. Suggest two ways inwards which this may occur.                                     [2 marks]

3. Tropical rainforests trim back the total of CO₂ and increment the total of O₂ in the atmosphere. Explain why both these occurrences are of import to living organisms.                                                                      [ two marks] 

Answer

1. i) B

  

   ii) A

    iii) Column for F drawn to 550. Column shaded inwards the same way equally the others, as well as labeled. Column drawn an equal width as well as distance from the others.

2. i) thirty years

  

   ii) 2 reasons from:

• to clear dry ground for agriculture, housing, manufacture or roads.
• to collect timber for housing
• to collect timber for fuel.

 iii) 2 suggestions from:

• plants cause got gone as well as thus in that location are no roots to bind the soil.
• wind blows soil away
• rain washes soil away.

3. Increased CO₂ tin order notice Pb to global warming, or flooding, or desertification.

O₂: organisms require O₂ for respiration to unloose energy.