1 / 10

Environmental Issues: Desertification and Deforestation

Environmental Issues: Desertification and Deforestation. Desertification. Desertification What is it?. Desertification: degradation of land into desert. Desertification How does it happen?. Human causes of desertification (major):

dinak
Télécharger la présentation

Environmental Issues: Desertification and Deforestation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Environmental Issues: Desertification and Deforestation

  2. Desertification

  3. Desertification What is it? Desertification: degradation of land into desert

  4. Desertification How does it happen? Human causes of desertification (major): - overgrazing of grasses by cattle takes away support holding soils together, allowing nutrients to be blown away - poor farming techniques can take nutrients from soil, leaving it to salty to be productive Natural causes of desertification (minor): - fire and climatic changes

  5. Desertification What are the effects? - reduction of nutritional density - famine - economic loss - loss of biodiversity (variety of plant and animal life)‏

  6. Deforestation

  7. Deforestation What is it? Deforestation: permanent destruction of forests and woodlands

  8. Deforestation How does it happen? Causes of deforestation: - cattle ranching - mineral and oil extraction - logging for wood and paper products - acid precipitation - fires - insect activity

  9. Deforestation What are the effects? - loss of biodiversity (variety of plant and animal life)‏ - loss of soil nutrients - increase in erosion, especially on hill slopes - increase in global warming - changes in climatic patterns

  10. Deforestation What can we do to limit deforestation in B.C.? - preservation of forest lands in parks - conservation/recycling of paper products - increased use of alternative building products

More Related