Fears flood water runoff could 'smother' Barrier Reef

Runoff from recent floods in northern Australia is flowing onto parts of the Barrier Reef, scientists said Friday, starving coral of light and providing fodder for the predatory crown-of-thorns starfish.

Video: The farm of the future?

There's a new trend in agriculture called vertical farming. As humans learned to farm, we arranged plants outside in horizontal fields, and invented irrigation and fertilizer to grow bumper crops.

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