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Population could be nearly 11 billion by 2100 The immense impact of Bill Gates Sr. Congratulations to the Class of 2013! New tasks become as simple as waving a hand Pollution a cause of '80s Africa drought
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Operating Instructions

Keyboard: To access the story gallery, close this window and tab to the first story. To close this window, either hit the "Esc" key or click the "Close" button.

Mouse: You can use the mouse to scroll through the gallery by clicking on an image behind the central image or by clicking on the left/right arrows in the slide bar or by clicking and dragging the handle in the slide bar. Click on the central image to open the viewer.

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