Always I struggle to imagine tiny portions – a few parts in ten thousand, parts in a millon. And I must find ways to imagine them if our children are to truly know them. Even as I marvel at the immense power of these few molecules, these vital Warmer Trace Gases, I become mindful that humans can now redirect this power – to enhance our lives or to destroy us.

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Chapter Six - Land of the Lost Trace Gases - Visions of our Power.        

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