Wednesday, 20 February 2013

HOW ARE ECOSYSTEMS DAMAGED?

All the living things in an ecosystem are connected in a delicate balance. Changes can cause destruction.





Forest fires destroy the plants and animals in an ecosystem.


Building a large number of houses can damage an ecosystem.


 Deforestation causes erosion and the landscapes can become a desert.

Air and water pollution damage ecosystems.
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4 comments:

  1. Students of 4ºA and Laura12 February 2015 at 00:56

    The last video is great!! We want to watch it again and again. We must take care of our planet.The students of 4ºA and Laura want to send you this message.

    ReplyDelete
    Replies
    1. Mercedes12 February 2015 at 02:56

      Thank you, Laura and children!
      What you say is true, we must take good care of the Earth!

      Delete
  2. Students of 4ºA and Laura20 February 2015 at 01:17

    Thanks Mercedes!! It's time to change the world!!

    ReplyDelete
  3. Ana and Ines 4ºA20 February 2015 at 01:55

    The exam is very easy with you student with there videos, this is the best unit becose are whit the digital board and no with the book.The last video is great and funny.

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