Human calendar

Clock

The environment: Global Warming – TSTG

[youtube]http://www.youtube.com/watch?v=FXntPfWi8H0&feature=related[/youtube]

[youtube]http://www.youtube.com/watch?v=OAK8Cd4t0WA[/youtube]

[youtube]http://www.youtube.com/watch?v=s0bw4ZzSqqY[/youtube]

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