pencemaran (pollution)

http://www.youtube.com/watch?v=TwM9_3thvss

http://www.youtube.com/watch?v=wgSiq8dzhgA&feature=related

http://www.youtube.com/watch?v=tYBSMoKsuOY&feature=fvwrel

http://www.youtube.com/watch?v=8e3fvskBbOA&feature=related

http://www.youtube.com/watch?v=N-aza74V0-Y&feature=related

http://www.youtube.com/watch?v=LmnI2BFvml0&feature=related

http://www.youtube.com/watch?v=MyqBnQ2UeqA&feature=related

our solar system

http://www.youtube.com/watch?v=BS88G5WBcfQ

http://www.youtube.com/watch?v=z6yHKE9dg0g&feature=fvwrel

http://www.youtube.com/watch?v=neGkkZMCgbY&feature=related

food chain - part 2

http://www.youtube.com/watch?v=7v1tyqa4sxQ&feature=related

rantai makanan ( food chain)

sila beri komen dan pandangan selepas tonton video ini.

http://www.youtube.com/watch?v=3Bn7wdCP2v4